Saturday, 5 June 2010

Prey ID please

I wonder if anyone can ID the grub in this Common Whitethroat's beak, at first I thought it was a fecal sack, however it was clearly alive and wiggly, both adult Whitethroat's bought several back and stuffed them down the necks of their hungry brood!

2 comments:

Nicholas said...

Not certain but it could be a spiders egg case full of baby spiders.

nirofo.

equoox said...

I agree with Nicholas, it does look rather like a spider's egg sac which, when being squashed by the beak, has split letting a spiderling or two escape, hence the wiggly legs .... but it is not that clear with the magnification allowed.