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Timing of autumn migration of young Corncrakes Crex crex
Author(s) -
DONAGHY ANITA M.,
GREEN RHYS E.,
O’HALLORAN JOHN
Publication year - 2011
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1111/j.1474-919x.2011.01104.x
Subject(s) - feather , demography , independence (probability theory) , biology , geography , ecology , statistics , mathematics , sociology
Knowledge of the timing of migration of young Corncrakes is required for effective implementation of conservation measures. Forty Corncrake chicks were radiotracked during the period between independence and departure from the natal area to determine the age and time at which fledged juveniles depart on migration. Departure occurred between early August and mid‐September at a mean age of 44 days, around the age at which growth of the primary feathers ceases. Chicks from later broods are exposed to greater risk of being killed during mowing, but provision of late mowing options in conservation schemes could enhance their survival.