We call them Cory's Shearwaters but Azoreans call them Cagarros - handsome big chocolate brown seabirds of the albatross family, much bigger than the Manx Shearwater we are used to in British waters.
The Cagarro spends most of its life at sea but comes ashore to breed in summer. I believe about 60% of the world population of cagarros breed on the Azores. And when they are here breeding on the cliffs of Flores, they don't half make a distinctive noise. "Wack-wack-wack-wack-WAAAAAAAAAACK" at night, as they wheel in flight above the village at night. Summer holidaymakers in Faja Grande are warned "If you hear a funny noise, it's the cagarros."
All of which is a long winded introduction to say I heard my first cagarro of 2007 last night.
I found myself explaining this about the cagarros to the first tourist on Flores of 2007. Is it global warming bringing the first tourist and first cagarro in February?