| Re: Pigeons and their drinking habits
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Could it be that the method of drinking is a throw-back to the squabs having to drink more continuously? I wonder if the sea birds who predigest the food for their young have a similar way of drinking.
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Pigeons have a double crop which apparently allows them to produce 'crop milk' so maybe that also allows them to generate suction?
According to the books it's just the pigeon family who drink like pigeons. And if you're a sea bird, drinking is probably just a case of submerging and swallowing! A penguin would surely have to bend its spine double to drink like a land bird.
henrya |