Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain.

Canestrari D Department of Biology of Organisms and Systems (BOS), University of Oviedo, Oviedo, Spain.
Bolopo D FitzPatrick Institute of African Ornithology, University of Cape Town, Cape Town, South Africa.
Turlings TCJ Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland.
Röder G Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland.
Marcos JM Dep. of Agro-forestry, University of Valladolid, Palencia, Spain.
Baglione V Dep. of Agro-forestry, University of Valladolid, Palencia, Spain.