Tuesday, 1 December 2020

Relaxing Days on the Pacific Coast of Costa Rica

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When Laura and I put together the itinerary for my parents' visit, we tried to fit in a variety of activities and planned to explore a diversity of areas in Costa Rica. A trip to Costa Rica would not be complete without some beach time. Following several days in the jungles of La Selva, our next two nights were spent in the town of Jacó on the Pacific coast. 

Jacó is a popular beachside town known for its surfing, dining and nightlife. Tourism is very popular here and the volcanic, black sand beach is a frequent hangout for surfers, families, honeymooners and other sun-seekers. We had rented an apartment through AirBnB in Jacó for two nights; it was located about a three minute walk from the beach. Laura and I usually do not spend much time relaxing near beaches when traveling but I have to say that this was a nice diversion! We tried to unwind, a somewhat difficult proposition due to the quickly escalating concerns about Covid-19 around the world. Once our flights home were booked, this was somewhat easier to manage. Laura and I were coming to grips with the fact that our world travels would be temporarily put on hold; of course, at the time we did not know or anticipate that it might be a year or longer until we could resume them. Ignorance is bliss. 

During the afternoon of our first full day we went for a drive up the coast. Our destination was a particularly famous bridge - Puente Río Tarcoles - which is famous for the large numbers of American Crocodiles which can be seen loafing along the banks of the river. We parked next to the bridge and spent the last hour and a half of the afternoon scanning for birds and other wildlife. 

 Puente Río Tárcoles, Puntarenas, Costa Rica

Despite being situated along a busy road, we noted quite a lot of wildlife from the bridge! My eBird checklist eclipsed 60 species. 

Blue Grosbeak - Puente Río Tárcoles, Puntarenas, Costa Rica

Great Egret - Puente Río Tárcoles, Puntarenas, Costa Rica

Great Kiskadee - Puente Río Tárcoles, Puntarenas, Costa Rica

A gaggle of male Great-tailed Grackles were putting on quite the show, trying to catch the eye of a nonchalant female, perched nearby. 

Great-tailed Grackles - Puente Río Tárcoles, Puntarenas, Costa Rica

Great-tailed Grackles - Puente Río Tárcoles, Puntarenas, Costa Rica

The crocodiles were easy to find since at least a half dozen were within a few dozen meters of the bridge. During our afternoon vigil, dozens of tourists stopped at the bridge to check out the crocodiles. I don't think many of them noticed the large diversity of waterbirds and other species that were also around.

American Crocodile - Puente Río Tárcoles, Puntarenas, Costa Rica

American Crocodile - Puente Río Tárcoles, Puntarenas, Costa Rica

Most of the "expected" waterbirds could be found, such as these comical Purple Gallinules. We also noted five species of shorebirds, a flock of Black-bellied Whistling-Ducks and a single Muscovy Duck. 

Purple Gallinules - Puente Río Tárcoles, Puntarenas, Costa Rica

Anyone who has visited this part of Costa Rica before can likely attest to the large numbers of Scarlet Macaws that inhabit the area. These impressive macaws are often heard long before they are seen, but they are impossible to miss visually as well. We counted at least eight pairs during our brief afternoon stakeout of the bridge. The Scarlet Macaws of the Pacific coastline of Costa Rica is a conservation success story. 

Scarlet Macaws - Puente Río Tárcoles, Puntarenas, Costa Rica

Scarlet Macaws used to be widespread in the lowlands of Costa Rica, on both the Caribbean and Pacific sides of the country. They experienced drastic population declines, partially due to capture for the pet trade. Due to the conservation work of a few dedicated groups, numbers of this beautiful species are slowly beginning to tick upwards on the Pacific slope. 

Scarlet Macaws - Puente Río Tárcoles, Puntarenas, Costa Rica

Motmots are among my favourite birds. I love watching them hunt and interact, and they exhibit interesting nesting ecology - excavating tunnels in the side of a riverbank or cliff, much like a kingfisher. It also helps that most species are stunningly beautiful. 

I spotted a pair of Turquoise-browed Motmots alongside the bridge while I was off birding with my dad. We enjoyed excellent looks at this species which is, in my opinion, one of the more spectacular motmots. Laura and my mom were at the other end of the bridge but they were able to return in time to enjoy these birds as well. 

Turquoise-browed Motmot - Puente Río Tárcoles, Puntarenas, Costa Rica

Turquoise-browed Motmot - Puente Río Tárcoles, Puntarenas, Costa Rica

We drove back to Jacó, stopping at a nearby beach to catch the last of the sun slipping over the horizon. The end of another day in paradise. The world was quickly undergoing lockdowns in many countries, and in Costa Rica things were starting to shut down as well. But that evening, it was easy to forget about the chaos and uncertainty for a few moments as we observed Scarlet Macaws and Turquoise-browed Motmots and experienced a beautiful ending to another day.

Playa Tárcoles, Puntarenas, Costa Rica

I had very few targets birds in this part of Costa Rica, meaning that I could relax throughout our time in Jacó. The one new species that I had a chance at finding was Pacific Screech-Owl. This species is found only on the dry Pacific coast from Oaxaca, Mexico to northwest Costa Rica but seems to be reasonably common within its range. I had never run into this species when birding Guatemala, the only other time that I was in the right area. I resolved to find this species the next morning and set my alarm for 4:30 AM.

The sky was dark as I left the apartment and ten minutes later I had reached my destination - an eBird hotspot known as Humedales Quebrada Bonita. This mosaic of agricultural fields, scrub, and wetlands holds a high diversity of species. My target species had been eBirded there recently so I was hoping for the best!

I checked a few forest remnants close to the road. The sky was lightening very quickly and the dawn chorus was already beginning. I had to hurry if I wished to find a screech-owl! It took a little bit of effort, but eventually one responded to my playback. It refused to make itself seen however. Even more fortuitous, I found a single Striped Owl and managed excellent looks in the dim pre-dawn light! This was a species that I had only seen once before, flying over the Panama Canal in 2014. 

I turned my attention to other birds once the sun began to creep above the horizon. Disturbed areas often hold a surprising number of species and it is easy to rack up a large list. While high quality forest holds many more species, those forests do not give up their secrets easily and many visits are required if one wishes to see this diversity. Quite the opposite in disturbed areas!

Variable Seedeater - Jacó, Puntarenas, Costa Rica

The presence of the wetlands meant that birds from several different ecosystems could be found here. It was difficult to keep up with the many new sightings! The first couple of hours around and after sunrise are, by far, the most productive hours of the day and I worked quickly to see as much as possible. By mid to late morning, the hot dry air puts an end to the frantic morning bird activity in this region of Costa Rica. 

Scrub Greenlet - Jacó, Puntarenas, Costa Rica

Groove-billed Ani - Jacó, Puntarenas, Costa Rica

I noted my third owl species of the morning by observing the behaviour of some agitated hummingbirds and flycatchers near the top of a tree. A Ferruginous Pygmy Owl. These owls are diurnal hunters, unlike the Pacific Screech-Owl and Striped Owl from earlier in the morning. This one even started vocalizing. I found a total of four Ferruginous Pygmy Owls during my walk!

Ferruginous Pygmy Owl - Jacó, Puntarenas, Costa Rica

Kingfisher diversity in the Americas is surprisingly low when compared to Asia and Africa. We have but six species spread throughout the two continents. The American Pygmy Kingfisher is the smallest, and also a species which I have only seen on a few occasions. This one teed up right beside me next to a flooded ditch, allowing some quick photos. 

American Pygmy Kingfisher - Jacó, Puntarenas, Costa Rica

American Pygmy Kingfisher - Jacó, Puntarenas, Costa Rica

Most of the species that I found were fairly widespread, such as this Green Heron, or migrants, such as the Philadelphia Vireo which is pictured next. 

Green Heron - Jacó, Puntarenas, Costa Rica

It was a really enjoyable walk with a nice variety of sightings. Scissor-tailed and Sulphur-bellied Flycatchers, Morelet's Seedeaters, Wood Storks and quite a few Black-headed Trogons represented other highlights from the walk. 
Philadelphia Vireo - Jacó, Puntarenas, Costa Rica

I left by 8:30 AM. Already at this hour, the sun was scorching the landscape and wildlife activity was diminishing. I headed back to the apartment to meet up with the others, having maximized the early morning hours. We enjoyed a relaxed breakfast before hitting the road and driving towards the Quepos area. 
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Wednesday, 25 November 2020

Last Morning at La Selva Biological Station

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March 16 was our final morning at La Selva Biological Station. Since the previous two days had gone so well, I did not have any pressing bird targets to seek out. We enjoyed a leisurely breakfast around 7 AM before crossing the swing bridge and birding a different trail. 

One of the highlight birds for everyone was this Chestnut-colored Woodpecker that perched in a tree just above eye-level. If only I had not screwed up the focus of this photo!

Chestnut-colored Woodpecker - La Selva Biological Station, Heredia, Costa Rica

It was a sweltering morning and birding was a little slower when compared to the previous day. Most species were repeats, though we added a few new ones. A Long-billed Starthroat perched in the same tree as the Chestnut-collared Woodpecker. An Eye-ringed Flatbill perched motionless on a horizontal twig. Northern Waterthrush and Ringed Kingfisher were found along the Río Puerto Viejo. And some heard-onlies, such as Great Antshrike, Black-faced Antthrush, and Lineated Woodpecker, were also new ones for the trip. 

Orses cynisca - La Selva Biological Station, Heredia, Costa Rica

It was a good day for cotingas. We viewed a pair of Snowy Cotingas from the swing bridge, though they were further than the previous day's sighting and I did not take any photos. It was nice for Laura and my parents to see this species, though! A little while later, some interesting vocalizations caught my ear, leading us to some very distant Purple-throated Fruitcrows in the canopy. 

It was mainly the herps that provided the best photographic opportunities.

Strawberry Poison Dart Frog (Oophaga pumilio) - La Selva Biological Station, Heredia, Costa Rica

A sprinkling of rain during the night was all that was needed to get the Strawberry Poison Dart Frogs out and about. We must have seen over a dozen of the little gems!

Strawberry Poison Dart Frog (Oophaga pumilio) - La Selva Biological Station, Heredia, Costa Rica

Strawberry Poison Dart Frog (Oophaga pumilio) - La Selva Biological Station, Heredia, Costa Rica

Any day that you see a snake in the tropics is a good day for Laura and I. Indeed, today was declared a good day when I noticed a sleek, black serpentine shape stretched out on the top of a bank near a small creek. I called everyone over and we enjoyed excellent looks at the impressively long specimen. I originally thought that this was a very dark Bird-eating Snake, but upon doing more research I determined that it was an Ecuador Sipo (Chironius grandisquamis). This was a milestone for me since it was the 100th species of snake that I have photographed in the wild. 

Ecuador Sipo (Chironius grandisquamis) - La Selva Biological Station, Heredia, Costa Rica

I tried to catch this individual but I should have known that my attempt would be futile. Sipos are extremely fast, much more so than a clumsy gringo. It whipped off the side of the embankment towards the creek. 
Ecuador Sipo (Chironius grandisquamis) - La Selva Biological Station, Heredia, Costa Rica

The Black River Turtle seems to be the default aquatic species in this part of Costa Rica. In fact it was the only turtle species that we encountered at La Selva. This one slipped off its log as we approached its creek, but it did not go far. 

Black River Turtle (Rhinoclemmys funerea) - La Selva Biological Station, Heredia, Costa Rica

Turtlin' - La Selva Biological Station, Heredia, Costa Rica

Our time at La Selva was unfortunately coming to an end. And later that day, Laura and I quickly realized that our galavanting in Central and South America was also going to be put on hold temporarily. 

We left La Selva and traveled west, crossing over the mountains and skirting San Jose on our way to the Jaco area on the Pacific Coast. We checked the internet and saw that the Prime Minister of Canada, Justin Trudeau, had issued a request to all Canadians that were abroad to come home "while you still can". We had been putting off the inevitable for the first few days of my parents' trip but could not any more. That evening, at our apartment in Jaco, we made the tough decision to book flights home to Canada. Luckily, Laura and I were able to book tickets for the same flight that my parents were scheduled to fly on. It was a tough decision, but a necessary one as Covid-19 was becoming a very real threat around the globe. 

As I write this over eight months later, the snow flies outside and the virus continues to wreak havoc around the world. In the grand scheme of things, not being able to travel is a relatively trivial problem when others are facing real loss. 

At least, in recent weeks there have been some positive developments on the vaccine front. 2020 is nearly behind us and I think that 2021 will be a much better year. Fingers crossed. In the meantime, I still have a few more Costa Rica posts from the remainder of my parents' visit. Stay tuned.

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Tuesday, 10 November 2020

A Big Day at La Selva Biological Station

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I left the cabin in the pre-dawn gloom, eager to watch the sunrise from the swing bridge. This would be my best chance at Snowy Cotinga. And with an entire day free to explore La Selva, I was hoping to encounter over 100 species. 120 was a reasonable goal, I thought, as I wandered down to the bridge.

White-ringed Flycatcher - La Selva Biological Station, Heredia, Costa Rica

One of the first birds that I observed from the bridge was the above-pictured White-ringed Flycatcher. This species looks similar to Rusty-margined and Social Flycatchers, two common birds in much of the Neotropics. However, its closest relatives are three other species of Conopias from South America. The White-ringed has a limited global range. Like its congeners it is mostly a lowland species, but it only ranges from coastal Honduras south to the Chocó region of western Colombia and northwestern Ecuador. White-ringed Flycatchers have a tendency to be somewhat uncommon. They also prefer to perch high up in the canopy, making them more difficult to detect.  Luckily, the swing bridge enabled me to be positioned a little further off the ground, high enough to appreciate the White-ringed Flycatcher at the top of the dead snag.    

Río Puerto Viejo - La Selva Biological Station, Heredia, Costa Rica

A nice variety of parrots, oropendola/caciques, flycatchers and toucans passed by my location. Some, such as this Brown-hooded Parrot, paused for a few minutes to rest in a riverside tree. 

Brown-hooded Parrot - La Selva Biological Station, Heredia, Costa Rica

Luck was on my side this morning. I noticed an intriguing dusky bird perched near the top branches of a distant tree. It was quite far, but identifiable as a Snowy Cotinga! It was in this situation where I wish I had a scope with me to better appreciate the bird, but this was much better than nothing. Cotingas are a type of holy-grail bird for many birders. They are distinctive, usually uncommon or at least difficult to find, and often incredibly beautiful (though a female Snowy Cotinga is probably not the best example of this!). The Snowy Cotinga is a lowland species with a limited range in the Caribbean lowlands of Central America. 


Snowy Cotinga - La Selva Biological Station, Heredia, Costa Rica

My plan had been to bird around the river for an hour or so at sunrise, then meet up with Laura and my parents for breakfast. Following the meal, we would embark on a nice morning hike on some of the forest trails. 

I still had a few minutes to spare before breakfast and so I quickly investigated a portion of the trail that flanks the river. This proved to be a good decision as I immediately heard a Semiplumbeous Hawk calling from somewhere unseen! This was one of my main targets for La Selva, a species I had never bumped into before. Luckily, the hawk began to call again and I eventually spotted it through a gap in the forest. 

The Semiplumbeous Hawk is a scarce forest hawk which often perches quietly in the canopy or forest edge. This species is known to follow groups of capuchin monkeys through the forests, since these primates often scare up lizards or other small reptiles - a perfect meal for a Semiplumbeous Hawk. 

Semiplumbeous Hawk - La Selva Biological Station, Heredia, Costa Rica

On my way back to the research station I came across my mom. Together, we observed a pair of Pale-billed Woodpeckers, and we also retraced my steps to observe the Semiplumbeous Hawk which had remained in the same area. 

The fruiting trees, flowering shrubs and open areas around the main research station proved to be quite attractive with a variety of bird species. Taking half an hour to enjoy a hearty breakfast did not really detract from the day's birding. I think I added around fifteen species to my eBird checklist for the day while enjoying breakfast.

Band-backed Wren - La Selva Biological Station, Heredia, Costa Rica

These Band-backed Wrens were a familiar presence around the research station.  I have to say, the wrens of the Neotropics are around 10 times more interesting than "our" wrens in eastern North America. These huge, boldly patterned wrens are one of my favourites.

Band-backed Wren - La Selva Biological Station, Heredia, Costa Rica

We finished up our coffees and hit the trails, heading across the bridge to the primary forest beyond. We first explored some gardens around the buildings on the far side of the bridge, adding a few species of tanagers to our lists. I excitedly pointed out our first Black-cowled Oriole in a fruiting tree. We all savoured the excellent looks at this beauty!

Black-cowled Oriole - La Selva Biological Station, Heredia, Costa Rica

As I mentioned in a previous post, many kilometers of hiking trails criss-cross portions of the reserve and quite a few of the trails nearest the research station have been constructed with concrete. Covered with a thin layer of moss, this substrate mutes footsteps which makes it easier to sneak up to wildlife before they hear you. 

We came across a few different tinamous on our walk, our quiet footsteps enabling this. Or, perhaps the tinamous at La Selva are just tame! Each one appeared to be a Great Tinamou, not my hoped for Slaty-breasted Tinamou. 

Great Tinamou - La Selva Biological Station, Heredia, Costa Rica

Tinamous are ground-birds that are most closely related to the Australasian ratites (cassowaries, emus and kiwis). They appear superficially like quails or partridges, but this is due to convergent evolution (i.e. two unrelated groups evolving the same thing independently). 

Great Tinamou - La Selva Biological Station, Heredia, Costa Rica

Great Tinamou - La Selva Biological Station, Heredia, Costa Rica

An ant-swarm caused some excitement during our walk. We first noticed steady streams of army ants swarming across the path and soon the telltale chips of antbirds caught our ears. We were positioned at the very edge of the antswarm, but it was heading away from us deeper into the forest. We still enjoyed many excellent sightings including Bicolored and Ocellated Antbirds, Plain-brown Woodcreeper and Northern Barred-Woodcreeper. 

Black-crowned Antshrike - La Selva Biological Station, Heredia, Costa Rica

A pair of Black-crowned Antshrikes posed at eye-level right beside the trail. Check out that hooked beak - perfect for capturing and devouring large insects (and perhaps, small reptiles). 

Black-crowned Antshrike - La Selva Biological Station, Heredia, Costa Rica

It is impossible to go for a walk in the tropics with Laura without a few interesting herps showing up! Her keen eyes located several frogs such as this Strawberry Poison Dart Frog (Oophaga pumilio).

Strawberry Poison Dart Frog (Oophaga pumilio) - La Selva Biological Station, Heredia, Costa Rica

The temperatures increased as the morning wore on. At least the shade of the mature forest helped mitigate this somewhat, but we really felt the heat of the day advancing when we left the forest for a brief walk on a boardwalk through an open wetland. At this time of year the water table was quite low, meaning that standing water was not present. I was really hoping that this would not be the case since these wetlands can be very productive for herps at night when they have water. 

Several dragonflies were taking advantage of the warm day. 

Red-mantled Dragonlet (Erythrodiplax fervida) - La Selva Biological Station, Heredia, Costa Rica

This next species is called the Amazon Sapphirewing. It is widespread in the lowlands of Amazonia and Central America but is apparently very difficult to come across. These dragonflies spend most of their time in the canopy but they will rarely come down, usually for short breeding encounters during the mid-day. We were very fortunate to see this one!

Amazon Sapphirewing (Zenithoptera fasciata) - La Selva Biological Station, Heredia, Costa Rica

While we are on the theme of invertebrates, here is an attractive jumping spider (identification to be determined). 

Unidentified jumping spider (subfamily Salticinae) - La Selva Biological Station, Heredia, Costa Rica

We began heading back to the research station, happy with the results of our morning walk. My eBird checklist was ticking along nicely; I believe I was over 80 species already. 

Laura and I love exploring on our own when we are in Central or South America. We generally try to avoid hiring guides for both economic reasons and because it takes away some of the thrill of discovery. But we have also benefitted greatly by the many excellent guides that we have bumped into or hired on occasion. On our way back to the research station we passed a local guide with her clients and she waved us over. She had found a mother and baby Brown-throated Three-toed Sloth!

Brown-thr. Three-toed Sloth (Bradypus variegatus) - La Selva Biological Station, Heredia, Costa Rica

Young sloths will stay with their mother for up to five months after birth, though they are fully weaned after only four or five weeks. Presumably, this is so that the young has time to learn the ways of the forest - which leaves are the best to eat, for example. Sloths are generalists that feed on leaves from a variety of trees, though certain species are preferred. 
 
Brown-thr. Three-toed Sloth (Bradypus variegatus) - La Selva Biological Station, Heredia, Costa Rica

We thanked the guide for generously calling us over and went on our way. As we crossed the bridge I noticed that there was a hawk and vulture flight commencing.

Turkey Vultures - La Selva Biological Station, Heredia, Costa Rica

Central America acts as a natural chokepoint for hawks migrating between North and South America. The middle of March is peak raptor migration time in Costa Rica.  Turkey Vultures were the dominant species and I counted around 1100 in half an hour or so of watching before the flight line changed, no longer being overhead. In addition, some small flocks of Broad-winged and Swainson's Hawks went over. 

Swainson's Hawk - La Selva Biological Station, Heredia, Costa Rica

After lunch my parents and Laura decided to take it easy for a bit. I relaxed for an hour or so as well, but the call of the birds drew me back outside. 

Scarlet-rumped Cacique - La Selva Biological Station, Heredia, Costa Rica

I had found most of my target birds at La Selva but there were two somewhat regular species which I still "needed". These were the Canebrake Wren and Nicaraguan Seed-Finch, two birds that have limited ranges on the Caribbean slope of Central America. I walked back down the entrance road of the research station, my destination being some weedy fields where the Nicaraguan Seed-Finch had been noted in recent weeks.  The walk out was fairly quiet, this fantastic Scarlet-rumped Cacique being the only appreciable highlight. 

Scarlet-rumped Cacique - La Selva Biological Station, Heredia, Costa Rica

I found the gravel road and associated fields where the Nicaraguan Seed-Finches and Canebrake Wrens are sometimes found. Early afternoon, however, is a difficult time to find birds, and the winds had picked up slightly as well which complicated matters. My main targets remained silent but I enjoyed picking through flocks of seedeaters while raptors and migrant swallows passed by overhead. Two Great Green Macaws also passed by. Like all macaws, they are usually heard long before they are seen.

Gray Hawk - La Selva Biological Station, Heredia, Costa Rica

Eventually, my ears picked up the distinctive vocalizations of the Nicaraguan Seed-Finch. Try as I might, it refused to come in any closer. I kept birding up and down the road to no avail and eventually had to concede defeat. The Canebrake Wrens remained unseen, and unheard as well. But it was a nice walk and I padded my day list which was fast approaching 120. 

Olive-throated Parakeet - La Selva Biological Station, Heredia, Costa Rica

With the sky beginning to sink in the sky I reconvened with Laura and my parents at the cabin. We used the last hour of light to walk a different trail (Sendero Zompopa) which flanks the east bank of the Río Puerto Viejo. Along here, Laura came through with a sleeping Hoffman's Two-toed Sloth far off the trail.

Hoffman's Two-toed Sloth (Choloepus hoffmanni) - La Selva Biological Station, Heredia, Costa Rica

Following another hearty dinner, the four of us set off down the entrance road for a night hike. I have heard in the past that this entrance road can be excellent for mammals, especially opossums on the hydro wires. Of course it just so happened that vehicles picking up workers drove past us every five minutes along this road, severely limiting our wildlife sightings. But we still saw a few things!

Common Pauraque nest - La Selva Biological Station, Heredia, Costa Rica

Orophus sp. - La Selva Biological Station, Heredia, Costa Rica

My dad spotted this opossum alongside the road - a Southern Opossum. This is a widespread species across much of Central and South America, but it was the first that I had seen. This species has a broad capability to adapt to environmental changes and as a result they are fairly widespread in secondary forest and inhabited areas.

Southern Opossum (Didelphis marsupialis) - La Selva Biological Station, Heredia, Costa Rica

I am a big fan of Leaf Katydids! This one is a member of the genus Mimetica.


Mimetica sp. - La Selva Biological Station, Heredia, Costa Rica

Leafhoppers, treehoppers, planthoppers and froghoppers are all favourite groups of mine. These unique hoppers have an incredible diversity of shapes, colours and patterns. This is a type of froghopper called Mahanarva costaricensis, a species with a limited range in Central America. 

Mahanarva costaricensis - La Selva Biological Station, Heredia, Costa Rica

Herps were difficult to come by during our walk, no doubt a reflection of the very dry conditions. All we could turn up were a few frogs. 

Masked Treefrog (Smilisca manisorum) - La Selva Biological Station, Heredia, Costa Rica

Leaf Litter Toad (Rhaebo haematiticus) - La Selva Biological Station, Heredia, Costa Rica

My parents turned around to call it a night but Laura and I pressed on, looping back along the Sendero Zompopa. This extra hike was well worth it since I discovered an adult Blunt-headed Treesnake. Despite being a common snake in secondary growth they are one that I never grow tired off. Their ridiculous proportions are almost unfathomable. For a snake whose circumference equals that of a slim pencil, it is a wonder how long they can grow.

Blunt-headed Treesnake (Imantodes cenchoa) - La Selva Biological Station, Heredia, Costa Rica

Blunt-headed Treesnakes feed on a variety of things, though anoles and other small lizards seem to be a favourite menu item. Cruising the understory of secondary growth is a great technique for this species, since many sleeping anoles can be found in these habitats. 

Blunt-headed Treesnake (Imantodes cenchoa) - La Selva Biological Station, Heredia, Costa Rica

Laura and I checked a few more areas before calling it a night. It had been a very productive day, with 123 bird species among all the other fun finds. The following morning would be our last at La Selva before our departure towards the Pacific coast. 

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