The Limpkin is usually placed in its own family group, and although it looks somewhat like an Ibis it is much more closely related to rails and cranes. Easily recognized by its loud echoing call; Limpkins in Florida were almost hunted to extinction for food. Like the Snail Kite, Limpkins feed primarily on the Apple Snail (Pomacea spp.) and has benefitted from the introduction of South American Apple Snails into the South Florida ecosystem from the aquarium trade. In fact almost all the Apple Snails in Green Cay are of the nonnative South American variety.
Speaking of which, one of the earliest birds to return from South America, is North America’s largest Swallow, the Purple Martin. The nest boxes at Green Cay are starting to fill up with Purple Martins which usually arrive in late January and early February. At the moment these birds are battling the European Starlings which compete with the Martins for their nest boxes. Here is a species that has come to rely on man for its survival. The colonies found in Eastern North America now rely almost exclusively on birdhouses built for them to nest. Unlike their Western counterparts, the Eastern Purple Martin population could be seriously threatened if their nest boxes were removed.
With their fairly predictable flight pattern and their close proximity to the Green Cay and Wakodahatchee boardwalks, the Martins make great subject to practice advanced flight shot photography. You have a relatively small and fast bird, so you’ll have to lead your target well. Because of how dark the Martins are you’ll have to dial in a +1 to +1.5 stop exposure compensation for their color to come out, especially against a clear blue sky. However, when these birds fly low enough to allow for a green background, then your shutter speed is going to plummet if you are in aperture priority (Av) mode, so it’s better to use Manual exposure (M).
