Alloparental care and kleptoparasitism in the semicolonial Montagu's harrier Circus pygargus
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Published source details
Arroyo B.E. & Garcia J.T. (2002) Alloparental care and kleptoparasitism in the semicolonial Montagu's harrier Circus pygargus. Ibis, 144, 676-679.
Published source details Arroyo B.E. & Garcia J.T. (2002) Alloparental care and kleptoparasitism in the semicolonial Montagu's harrier Circus pygargus. Ibis, 144, 676-679.
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This study is summarised as evidence for the following.
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Foster eggs or chicks of raptors with wild conspecifics Action Link |
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Foster eggs or chicks of raptors with wild conspecifics
A replicated study in cereal fields in Madrid province, central Spain, in the breeding seasons of 1991-6 (Arroyo & Garcia 2002) found that 15 Montagu's harrier Circus pygargus nestlings introduced into foster nests at the age of 15–20 days were all successfully ‘adopted’, whereas three fledglings introduced at the age of 27–29 days were rejected by their intended foster parents and attacked when they begged for food. All nests already had nestlings in and all but two received a single nestling. One of these one was given two 15-20 day-old nestlings, the other two 27-29 day-olds.
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