Richard Du Toit / African olive pigeon (Columba arquatrix) Garden Route, Western Cape Province, South Africa.

Juergen & Christine Sohns / African Olive-Pigeon (Columba arquatrix), Singapore Zoo, Singapore

Edwin Giesbers / African olive pigeon (Columba arquatrix) portrait, captive

Hanne & Jens Eriksen / Olive pigeon (Columba arquatrix) in tree, Mahweet, Yemen

Hanne & Jens Eriksen / Olive pigeon (Columba arquatrix) Mahweet, Yemen

Richard Du Toit / African Olive-Pigeon (Columba arquatrix), Montagu Pass, Western Cape, South Africa

Julian Hume / Illustration of Mauritian birds. Mauritius pink pigeon (Nesoenas mayeri) (centre left); Mauritius fody (Foudia rubra) (centre right); Mauritius olive white-eye (Zosterops chloronothos) feeding on the...

Kim Taylor / White rock dove / Feral pigeon (Columba livia) in flight, carrying olive branch of peace, digital composite, Surrey, England

Roland Seitre / Olive pigeon (Columba arquatrix) chick in nest, Armand Cleynen Aviculture, Belgium. Captive, occurs in Africa.