Showing posts with label Eastern Foxsnake. Show all posts
Showing posts with label Eastern Foxsnake. Show all posts

Sunday, 24 July 2011

The snakes of Ontario - part 3

Part 1 - Eastern Gartersnake, Dekay's Brownsnake, Northern Redbelly Snake, Northern Ribbonsnake
Part 2 - Northern Watersnake, Lake Erie Watersnake, Queensnake
Part 3 - Eastern Milksnake, Eastern Foxsnake, Eastern Hog-nosed Snake
Part 4 - Northern Ring-necked Snake, Smooth Greensnake
Part 5 - Gray Ratsnake, Butler's Gartersnake
Part 6 - Blue Racer, Eastern Massasauga

This post will cover some of Ontario’s largest species – the Eastern Milksnake, Eastern Foxsnake, and Eastern Hog-nosed Snake.

Eastern Milksnake (Lampropeltis triangulum triangulum)

The Eastern Milksnake is one of the prettiest species found in Ontario, and also one of the most wide-ranging. They do range all the way from SW Ontario east to Ottawa (and beyond), and north to Manitoulin Island. Milksnakes are generally considered to be habitat generalists, being found in river valleys, deciduous woodlands, fields, barrens, alvars, and even residential areas. It seems that they prefer edge habitats complete with ample cover (for thermoregulation) and prey.

Eastern Milk Snake - Muskoka Co.

Eastern Milksnake - Flamborough, City of Hamilton

Eastern Milksnake - Bruce County

Eastern Milksnake scalation

Much of agricultural Ontario no longer can support populations as it once did, and Eastern Milksnakes are largely absent from most agricultural areas from Essex County northeast to the southern part of Georgian Bay. In the past, many fields were left fallow and large hedgerows were present. Nowadays, the trend to go to a more intense form of agriculture has eliminated many of the hedgerows and old fields which provide habitat for this species. Fortunately there are still many good areas in southern and central Ontario. This photo from the Long Point area shows a great Eastern Milksnake spot with long grass, coverboards, and most certainly a lot of mice.

Eastern Milksnake habitat - Norfolk Co.

On the Bruce Peninsula and in “cottage country” Eastern Milksnakes can often be found near open rocky areas. This unique habitat is also used by other species, such as Smooth Greensnake, Eastern Massasauga, and Eastern Foxsnake.

Eastern Milksnake habitat - Muskoka District

I’ve had a bit of success with this species around where I live in Cambridge. Their density here seems to be fairly low though. Here are some shots of local Eastern Milksnakes: 

Eastern Milksnake - Waterloo Region

Eastern Milksnake - Waterloo Region
 
Eastern Foxsnake (Elaphe gloydi)

A brief word about the latin name for this species: In the past, much of the New World and Old World species belonged to the genus Elaphe. In North America, the Bullsnakes, Foxsnakes, Cornsnakes, Ratsnakes, and others belonged to it. Recent genetic work has proposed a whole re-working of the genus, though there is still controversy over the validity of this work. For now, I’ll stick to calling them all Elaphe.
Eastern Foxsnake is a fascinating species that I have spent a lot of time with over the last couple of summers. I’ve been fortunate to see dozens of this species, even doing some radio-tracking of them. As a result I’ve managed to see some interesting behaviour and some cool individuals, such as this hypomelanistic animal that a friend of mine found.

Eastern Foxsnake

Eastern Foxsnake

Eastern Foxsnakes are one of the most “at risk” species of North American snakes. Their global range only includes a few counties along Lake Erie in Ohio and Michigan, as well as three-ish populations in Ontario, all relatively small in size. The reason for this decline is simple – they depend on lakeshore marshes and adjacent woodlots and farmlands, which are being destroyed at a very quick rate. Road mortality is also a strong factor for this species which spends a lot of time wandering around over large areas. We have seen movements of over a kilometre in a day with some of our animals.

Eastern Foxsnake - Essex County

For now though, they seem to be stable in parts of southern Ontario, and hopefully this continues!

Eastern Foxsnake - Essex County

Eastern Foxsnake - Essex County

Eastern Hog-nosed Snake (Heterodon platyrhinos)

The Eastern Hog-nosed Snake is definitely one of the most bad-ass snakes in Ontario, perhaps second only to the Eastern Massasauga. Not only is this snake heavy bodied and capable of growing to a length over 4 feet, but it also has the most impressive display when provoked. While many snakes may, perhaps, strike at a predator when cornered, the Eastern Hog-nosed Snake takes this to a new level. This species will strike, flatten out its neck cobra-style, defecate on their own body (to make themselves as distateful as possible), and if all else fails, play dead.

Eastern Hognose Snake - Norfolk County

Despite this impressive display, the Eastern Hog-nosed Snake is a Threatened species in Ontario, mainly to the loss of their preferred habitat. Hoggies are specialists that rely on areas containing loose, sandy soil, as well as a high toad population. While many species are generalists when it comes to dietary preferences, Eastern Hog-nosed snakes subsist on a diet dominated by toads. The sandy substrate is necessary so they can use their upturned snout to dig out cavities in which they deposit eggs. This is quite an impressive feat for a snake!

Eastern Hognose Snake - Muskoka District

This photo here characterizes good Eastern Hog-nosed Snake habitat. The substrate is very sandy, there are brush piles and ample  vegetation to provide cover, and the canopy is fairly open so that the snakes can thermoregulate. Not visible in the photo is the series of ponds off in the distance that American Toads use to breed in.

Eastern Hognose Snake habitat - Norfolk County

The Eastern Hog-nosed Snake ranges in two bands in Ontario - one band stretching along the north shore of Lake Erie, and another band reaching from southern Georgian Bay east to the Kawarthas. The southern Georgian Bay animals are particularly interesting. Due to the lack of sandy soils, Eastern Hog-nosed Snakes here can be readily found on granite outcrops and shorelines.

Eastern Hog-nosed Snake - Muskoka District

Eastern Hog-nosed Snake - Muskoka District

This individual was basking quietly under a juniper shrub, not 20 meters from open water.

Eastern Hognose Snake - Muskoka County

In late summer the eggs hatch and baby hoggies can be found regularly in some spots. Unlike the dark, patternless individuals pictured above, these neonates I photographed had a very strong dorsal pattern. Eastern Hog-nosed Snakes are one of the most variable species in Ontario, with some being jet black, others brown and blotchy, and others a brilliant orange/red. But all have that lovable upturned snout.

Eastern Hognose Snake - Norfolk County

I have decided that I will split up the remaining species (Smooth Greensnake, Northern Ring-necked Snake, Black Ratsnake, Butler's Gartersnake, Eastern Massasauga and Blue Racer) into three posts. Stay tuned!

Thursday, 23 June 2011

More butterflies

As promised here are a few butterfly photos from lately. A lot of new species have emerged in the past week or two and I've been trying to get decent photos of as many of them as I can.

I took a break for an hour with my coworker Shane on June 13th, so we ventured into the Spring-garden area to see what we could find. Along with Summer Azures, Northern Crescents, Black Swallowtails, and a few more of the regulars, we also saw:

Silvery Checkerspot

Least Skipper

Peck's Skipper

And the highlight of the walk - 2 adult Eastern Foxsnakes. This female was pit-tagged by Ojibway in 2004. She was 66 grams then (just a baby) and was now over 450 grams. Considering that some of our Eastern Foxsnakes are close to 900 grams, this puts into perspective the longevity of these snakes.

Eastern Foxsnake

A few more butterflies from this week:

Northern/Pearl Crescent

European Skipper

European Skipper

 The Baltimore Checkerspots are still common in the Tallgrass Prairie across from the Ojibway Nature Centre.

Baltimore Checkerspot

Baltimore Checkerspot

 Some of the next few I am not too sure on the IDs.





Southern Cloudywing

Hobomok Skipper

European Skipper

Wild Indigo Duskywing

In other news, I finally ordered a Nikon 300mm f/4 AF-S lens. While not one of the huge telephotos that are 5,000-10,000$, this is still a very good quality lens for a fraction of the price. Image quality appears excellent with this lens - the only drawbacks being reach (its only 300 mm) and brightness (if it is used with a teleconverter). This is my first lens that isn't a macro or wide-angle lens, so I am pretty excited to test it out with some butterflies and birds...

Sunday, 22 May 2011

Some highlights from Windsor

While I haven't made it to Pelee nearly enough this spring, not all is lost. Because I am working in the Ojibway area of Windsor, decent numbers of migrants can be found easily, even when I am "working". Some highlights so far:

Northern Goshawk: I spotted a juvie bird circling on a hot sunny day. Russ Jones had it the next day chase a green heron out of a woodlot!

Common Raven: Regular back home, but very uncommon in Essex County. Yesterday, one flew over my study site calling while being harassed by crows.

Acadian Flycatcher: One was present for a few days in the Spring-garden area. I found it on May 10 and it was seen that evening by Jon Pleizier, Shane Butnari, and Russ Jones. Seen on the 11th as well. 

Kentucky Warbler: On May 11, I was present in a field while a group of planters where relocating native tallgrass species. I saw a few warblers in some nearby poplars. A bit of pishing produced a gorgeous Kentucky warbler, which approached to within 10 feet of me.

Connecticut Warbler: One male heard and seen at close range in the Spring-garden area.

Cerulean Warbler: Two singing males!

And of course, Eastern Foxsnakes: