I caught this Anhinga as he was climbing out of the water onto an Alligator ramp. This waterway is a canal along the edge of an old rice field impoundment that attracts many fish eating birds.
Anhingas feathers are not waterproof which helps them to swim and hunt low in the water but also means they have to leave the water to dry off.
You can see the gular pouch extending below. Similar to a pelican’s pouch, this skin between the beak and neck helps the bird “open wide” and swallow much larger fish than you might expect.
I haven’t seen an Anhinga do this while drying off and am not sure what he was up to. I waited awhile to see, but like many of the water birds these fellows can spend a long time doing nothing and I lose interest or get distracted by something more interesting.