From the sharp, hooked beak of a hawk to the delicate, nectar-sipping bill of a hummingbird, every shape tells a story of ...

Using digitization techniques, the researchers found that 14 distinct beak shapes, that at first glance look unrelated, could be categorized into three broader, group shapes. Despite the striking ...

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.

has provided scientists new insights into the evolution of face and beak shapes of the distant ancestors of modern birds. The researchers originally discovered the fossil of the crow-sized bird in ...

II-G. Spiriferids: biconvex, strong ribs, long hinge line with wing-like shape. Deep fold and sulcus. II-I Rhynchonellids: biconvex, short, bent hinge, pointed beak (V-shaped), deep ribs, deep fold ...

The different finch species on the islands are closely related to each other, but show wide variations in beak and body size and feeding behaviour. In particular, changes to the size and shape of the ...