New research shows that in order for some early birds to catch the worm, they have to breed sooner in the spring.
Luke DeGroote is the avian research coordinator at Carnegie Museum of Natural History, and he runs the bird banding program at the museum's Powdermill Nature Reserve.
Right now, he’s in the thick of spring migration.
“It’s sort of a bit like fishing, in a way. We put out our nets to see what we catch,” he says.