Why is wing-spreading behaviour absent in blue-eyed shags?

International audience Wing spreading is a general behaviour in cormorants, and has been described worldwide in most species (Orta 1992). Yet, this behaviour is missing (with some exceptions, see below) in the species belonging to the so-called ‘blueeyed shag complex' (Bernstein & Maxson 19...

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Bibliographic Details
Published in:Animal Behaviour
Main Authors: Cook, Timothée R., Leblanc, Guillaume
Other Authors: Centre d'études biologiques de Chizé (CEBC), Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2007
Subjects:
envir
geo
Antarctic
Antarctic Peninsula
New Zealand
Orta
Patagonia
Southern Ocean
Antarc*
Online Access:https://doi.org/10.1016/j.anbehav.2006.11.024
https://hal.archives-ouvertes.fr/hal-00182823
Description
Summary:International audience Wing spreading is a general behaviour in cormorants, and has been described worldwide in most species (Orta 1992). Yet, this behaviour is missing (with some exceptions, see below) in the species belonging to the so-called ‘blueeyed shag complex' (Bernstein & Maxson 1981), hereafter referred to as ‘the complex', a group of cormorants living on the coasts and islands of the waters of the Southern Ocean between roughly 40S and 70S latitude (Patagonia, Antarctic Peninsula, subAntarctic Islands, New Zealand) and comprising 13 species that have close morphological similarities (Siegel-Causey 1988).

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