Photo of Nadia Alexis by Cullen Brown; IMAGE BY Grace Han FOR THRILLIST You never forget your first. For Jenna Curtis, who works on the eBird app from Cornell Lab of Ornithology, it was a small gray and white Dark-eyed Junco, spotted in her backyard while home sick in eighth grade. “It was the first time I’d ever noticed birds in our yard, and they were the most beautiful birds I’d ever seen,” she remembers. “I convinced my dad to buy a bird...