Little is known about the biology of the Great Spotted Cuckoo (Clamator glandarius) in Israel. After erecting nest boxes intended for cavity-nesting raptors, however, we had opportunities to observe Great Spotted Cuckoos parasitizing Eurasian Jackdaws (Corvus monedula) that also nested in some of the boxes. During the 2003 breeding season, we monitored seven jackdaw nests, six of which were parasitized by cuckoos. In five of the jackdaw nests, one to four cuckoo eggs hatched, and one to three nestlings survived to fledge (four nests). This is the first documentation of Great Spotted Cuckoos parasitizing jackdaws in Israel.
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