concord's picture

Bird puzzle

Observed: 1st May 2010 By: concordconcord’s reputation in Birds
IMG_1347.JPG
Description:

think its great tit but but do not know if the have a beak this long

Identifications
Species interactions

No interactions present.

Comments

anonymous spotter's picture

Great Tits

I read some time ago that the beak changes shape dependent upon the season (and hence the predominant food supply, one assumes).

Urophora's picture

There is no doubt it is a

There is no doubt it is a Great Tit, and I am not sure what is odd about the beak. It looks absolutely right to me, though with some imagination you might make it abnormally extended (in which case it would be a developmental abnormality or the result of disease or injury). Blue and Long-tailed are the ones with very short bills.

Kluut's picture

Beak

It is very difficult to tell in the photo' because of the way the bird is lit, but does the bird have an over-shot beak (an extended upper mandible - it seems to extend into the white blob in the photo')? It may also be abnormally long in both mandibles.
If so, it usually starts as a very minor damage which stops the two mandibles from mating together properly. In all birds it is a combination of the mating together of the two and their normal use that determines their wear and hence shape and length. Once a beak starts to grow abnormally, it will not correct itself.
If the bird does have an over-shot beak, it will probably lead to its demise as ultimately it will not be able to feed properly.