These birds are most active at dawn and dusk. The Atlantic Puffin, which is nicknamed “the clown of the sea,” has a stunning beak that turns bright orange, yellow, and blue during the breeding ...

Males have bright yellow feathers covering most of their bodies, with a reddish-brown “cap” atop their heads during the breeding season. They are territorial birds that defend their turf from ...

Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.