A small warbler of the upper canopy, the Northern Parula can be found in two rather distinct populations. The southern population nests primarily in hanging Spanish moss, while the northern population uses the similar-looking old man's beard lichen.
In addition to mammals and waterfowl, Bayou Cocodrie provides a place for woodstorks, herons and egrets to live. These long-legged waders can be seen stalking small fish and large insects along the water’s edge. Ospreys and swallow-tailed kites can occasionally be seen swooping down on prey in open waters and fields. The refuge also plays a role in providing much needed habitat for declining species of migratory songbirds such as Kentucky, Swainson’s, hooded and prothonotary warblers.
Three protected species use the refuge from time to time. Bald eagles and peregrine falcons can be observed usually during the winter months perched in high trees.