Saturday, November 26, 2011

Kicau Burung Nusantara Roosting behaviour

Kicau Burung Nusantara Roosting behaviour
Common Mynas roost communally throughout the year, either in pure or mixed flocks with Jungle Mynas, Rosy Starlings, House Crows, Jungle Crows, Cattle Egrets and Rose-ringed Parakeets and other birds. The roost population can range from less than one hundred to thousands. The time of arrival of Mynas at the roost starts before and ends just after sunset. The mynas depart before sunrise. The time and timespan of arrival and departure, time taken for final settlement at the roost, duration of communal sleep, flock size and population vary seasonally.
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The function of communal roosting is to synchronise various social activities, avoid predators, exchange information about food sources.

Communal displays (pre-roosting and post-roosting) comprise of aerial maneuvers which are exhibited in the pre-breeding season (November to March). It is assumed that this behaviour is related to pair formation.

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