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We actually have like two subspecies of sea crow that I know of. One can be found year round, and another during a couple of months. Phalacrocorax carbo and Phalacrocorax aristotelis

Ah! Potugal, one of my good friends here family live in Portugal, butv deon't ask me where.
We have 5 species of Cormorants (Sea Crows) in South Africa.
Phalacrocorax africanus, Phalacrocorax coronatus, Phalacrocorax lucidus, Phalacrocorax neglectus and Phalacrocorax capensis.

They are all in South Africa all year round!