JUKEMA J, K GROENENDIJK & P VAN DER WERF (2010) House Sparrow Passer domesticus feeds House Martin Delichon urbica nestlings. LIMOSA 83 (1): 36-38.

This note describes observations of a female House Sparrow feeding House Martin nestlings. Feeding by the House Sparrow was recorded in a village in Friesland on at least three days in June and July 2009. Except for the last day when only one of the three nestlings remained in the nest while the other two had presumably fledged, both the House Sparrow and the adult House Martins fed the nestlings. No direct aggression between the species was observed but the House Sparrow seemed to be dominant over the martins, sometimes occupying the nest for prolonged periods. While the parents fed insects to their young, the House Sparrow usually brought them bread crumbs. Probably all three nestlings fledged successfully.

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