Rhinonyssidae
Videos
Rhinonyssidae is a family of mites in the order Mesostigmata. There are about 16 genera and at least 460 described species in Rhinonyssidae.
Beak
Videos
The beak or bill is an external rostrum structure found mostly in birds. A beak is used for pecking, grasping, and holding, preening, courtship, and feeding young. The terms beak and rostrum are also
The bony core of the beak is a lightweight framework, as seen on this barn owl's skull.
A gull's upper mandible can flex upwards because it is supported by small bones which can move slightly backwards and forwards.
Mallard with an injured beak after a dog attack. Parts of the rhamphotheca have detached, exposing the periosteum.
The sawtooth serrations on a common merganser's bill help it to hold tight to its prey, a fish.