Posted by admin | Posted in Uncategorized | Posted on 22-02-2010
Tags: adaptations, beak, bird, bird beak adaptation activity, bird beak adaptation lab, bird beak adaptations, bird beak shapes, bird beaks, birds, science

What purpose does the growth at the top of a bird’s beak have?
It looks like chalk at the top of a pigeon’s beak. I’ve noticed it in on crows too but its black in that case.
It might just be the bird’s nostrils or nose.
It’s called the cere. It is a fleshy, waxy protrusion where the nostrils are located. Some birds have it, some birds don’t
It is the key to determining the sex of a budgie- males have blue ones, females have brown ones, but not all birds are like this.
As for it’s function- there’s not much written about it. Maybe it aids with sexual dimorphism in some species, maybe it plays some practical role such as stopping a birds with curved beaks getting hit in the face with things they are breaking with their beak! (I don’t know, I made that up!)
In crows you might be thinking of rooks, which have grey faces. It makes it look like they have an even longer beak than they really do, but the grey at the base is not the beak or cere, it’s actually their face. I have never noticed a crow with a prominant cere, myself.
Bird Beaks
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