Cormorant: hung out to dry | Nature Notes

We must all have seen a cormorant (Phalacrocorax carbo) doing this but why do they do it? Conventional wisdom says it is to dry their wings which obviously get saturated after they have been diving. This may well, of course, be very true but it raises the question that why do cormorants need to do it when other diving birds do not? You never see duck or grebes, for example, drying their wings after a fishing expedition. The answer could well be that the cormorant has much bigger wings and. as it spends more time flying than a duck or a grebe, then drying them out is more important.
I have, however, heard a theory that this posture aids their digestion. 

Read more: Cormorant: hung out to dry | Nature Notes

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