[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Cormorants, anhingas & soaked feathers

As we all know (I presume), cormorants and anhingas lack water-repellent plumage. That is, diving means they'll get soaked to the skin and will have to dry their feathers afterwards.

The latter thing takes time while the succes of the dive isn't even assured. In my logic, this puts cormorants and anhingas at a considerable disadvantage compared to their waterproof competitors.
The diving itself doesn't seem like the reason for the strange strategy employed by these birds. After all, loons,grebes,auks and mergansers all dive succesfully with their waterrepellent plumage.

So I wonder, what could be the use of getting soaked to the skin and having to dry up, what makes it such a succesful strategy and why could it have evolved in the first place (or: why didn't waterproof plumage evolve in cormorants and anhingas?


Nooit ongewenste berichten ontvangen: gebruik MSN Messenger http://messenger.msn.nl/