Hey Dan, looks like you had a fantastic time down there! I only wish for a better body/head angle and a bit more room in front, but I love the backstroke wing positions and the beautiful BG.
Hi Dan: Some great stuff from Costa Rica. I like this Mango as well. Great photographing with you during the trip. I may need some help Id'ing some birds from the trip. I'm sure you'd be able to nail the ID's. I was amazed at your birding skills. Great Stuff.
I think the crop works fine Dan, and the bird looks great against the BG. A slight head turn towards you would improve the image. On my laptop, the iridescent plumage looks kind of funny; sort of like a painting.