File:Australian Crested Pigeon - Ocyphaps lophotes 01.jpg

These common birds are fascinating. Recently ANU discovered that the alarm sound when these birds take flight, is a non-vocal sound. It is produced by the increase in airspeed between in 8th primary feather and the others on the outer wing. ANU scientist trimmed this feather on both sides and discovered it changed the sound produced. This was first hypothesized by the legendary biologist; Charles Darwin. Like other pigeons, they also produce milk for their young too. They produce milk in there crop and feed their young.This is believed to help their immune system as it does in mammals. These truly are fascinating birds and there is still much to learn from them.

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