Wow, thank you all for the questions!
@PerfectClick, I think my friend can identify all the bird species are the nature center! He majored in biology and art, so I wouldn't be surprised if he can!
@Pixels
From what I understand, my friend interned at the wildlife center that is having him do the photographs. I think it's all about having connections and being in the right place at the right time.
@Amanda Louise
The birds at the center are resident birds. The center does education, so they are the education birds that they keep there. They might also have him do some wild birds that live near the center, but I'm not sure.