This article is part of Project Biology, a All Birds project that aims to write comprehensive articles on each term relating to biology.
This article is part of Project Evolution, a All Birds project that aims to write comprehensive articles on each evolutionary term related to birds.
This article is part of Project Animal Behaviour, a All Birds project that aims to write comprehensive articles on each term general related to animals.
This article is part of Project Bird Behaviour, a All Birds project that aims to write comprehensive articles on each behavioural term related to birds.