![chaffinch uplose chaffinch uplose](http://www.planetofbirds.com/wp-content/uploads/2012/02/chaffinch-uplose.jpg)
chaffinch uplose
Competing against older brothers and sisters can be tough work, as any youngest child will tell you. But new research from a biologist at the University of North Carolina at Chapel Hill shows that when it comes to some birds, you should reserve any underdog sympathies for the first born — or rather, first laid — siblings as well.