The Northern Parula is a small (4-1/2"/11cm) warbler with blue-gray upper parts, yellow throat, white belly, two wing bars, and a yellowish-green "saddle" on its back. It's a summer resident in Louisiana, breeding in swamps, lakes and ponds. They are very dependent on Spanish moss for their nests.
We discussed this bird in our class⎯the first I'd heard of it⎯so it was quickly added to my wish list. Our instructor heard it first, then found it. That's the way we discovered most of the birds, by hearing first. I wish these photos had been better. Besides the bird being small, it flitted around quickly and the lighting was poor. I am no longer striving for photographic perfection since it would limit the variety of birds to post on my blog.