Saturday, February 25, 2012

McEgret's - The Cattle Egret


There are certain birds that you can say with certainty exactly where you will find them. As their name suggests, where there are cattle there are Cattle Egret (Bubulcus ibis). Spot a roadside mower or a tractor in a field and there will be Cattle Egret and where there is smoke in the grasslands, there will be Cattle Egret. Much to my surprise, after departing a well-known fast food chain drive-thru, I discovered that the habitat of this bird can be extended to here as well.

Cattle Egret found their way to the New World from Africa sometime in the late 19th century and flapped and grazed their way north into the US by the mid 20th century. They have a distinctive head bob that makes them appear to strut like a chicken. In addition to the bovine company they keep and their amusing gait, adult Cattle Egret are easily identified by the colorful plumage on their chest and cap that has the appearance of lightly toasted marshmallow.

The habit of following in the wake of cattle, mowers, tractors or wildfires tremendously assists the birds as they forage for insects. As they are stirred up by each, the egrets take advantage of the chaos in the insect world. While most birds are escaping a wildfire, the Cattle Egret will swoop in soon after and enjoy the BBQ.

When the egrets are full or have tired of walking the tall grass prairies, they hitch a ride and go cattle surfing. The grazing goliaths seemingly ignore one bird on their back but a second bird is the start of a party and a tail slap rectifies the situation.

I don’t make a habit of eating anything that comes from a drive-thru nor do I use Photoshop for any of my Audubon Guides photos, but in this instance, for my amusement and to avoid commercial endorsement I have touched it up a bit.  

Why was the Egret in the drive-thru? I hope it wasn’t looking for its surfing partner. 

Monday, February 6, 2012

Aquatic Ferrari - The Florida Softshell Turtle

There’s a tremendous advantage to having a tall carapace (upper shell) and sturdy plastron (bottom shell) if you’re a turtle in the southeastern United States. Here there be alligators and despite the fact that an alligator can exert thousands of pounds of pressure of chomping power on their prey, if they can’t slam their jaw shut on their oversized meal, they have to look for lunch elsewhere.

Sliders and Cooters are the SUVs of the turtle world. They’re hefty, relatively slow moving but strong bodied. I’ve often seen tooth marks where an alligator has cracked a hole in the carapace but got no further. Florida Softshell Turtles (Apalone ferox) on the other hand have soft, flexible upper and lower parts that are covered in skin as opposed to the keratinous, fingernail-like covering on other turtle shells. Softshells are the Ferraris of the turtle world. While the shell doesn’t afford them much protection against the crushing bite of an alligator, I have seen them use their speed to their advantage. The bottom right photo shows the head of a large female softshell in the toothy grasp of the alligator. The turtle didn’t panic and seemed content to be escorted around. Instead of struggling and wasting energy, it was biding its time. When the alligator opened up to get a better bite, the softshell took off with a burst of speed. Sorry gator.
The Florida Softshell Turtle can be distinguished from other softshells by the bumpy ridge above the head on the carapace. Males grow to be around 12 inches while females are sizably larger at 20 inches. Florida softies are omnivorous and aquatic, although they do bask out of the water and cross roads as necessary. In the spring the females will find a soft-soiled area to lay their eggs or if they’re feeling lucky, the female will sneak her eggs into the side of an alligator’s nest where ironically they are protected from nest predators by the mama alligator. Ultimately it doesn’t matter if you’re an SUV or a Ferrari. What matters is how long you’re in the race.