harbour Borrelia and thus can potentially disperse Lyme disease over a wide region. Coccidia such as Isospora sp. are known in this species. The common cuckoo is sometimes a brood parasite of this species, and kestrels may sometimes prey on them. References External links Grey wagtail videos, photos & sounds Grey wagtail (schmitzi) Ageing and sexing (PDF; 0.97 MB) by Javier Blasco-Zumeta & Gerd-Michael Heinze grey wagtail Birds of the Canary Islands Birds of the Azores Birds of Madeira Birds of Macaronesia Birds of Eurasia grey wagtail grey wagtail