Time of roosting of Barn Swallows Hirundo rustica at an Irish reedbed during autumn migration

作者: Patrick Smiddy , Chris Cullen , John O'Halloran

DOI: 10.1080/03078698.2007.9674369

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摘要: Barn Swallow Hirundo rustica roosting time was studied at a south‐coast Irish reedbed during 2003 to 2006. Roosting varied between 11 and 35 minutes after sunset. There no significant difference in sunset across years. (relative sunset) later July than August September. The interval of the earliest latest birds usually spanned period about 10 15 minutes, but could be as long 30 minutes. light intensity 41 6 lux.

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