The common or European cuckoo is a palearctic migrant in Tanzania on southward passage from October through December and northward from March through April. Note that yellow is confined to the base of the mandible and the outer tail feathers are spotted. The top photo was taken in the Ahusha highlands, courtesy of Frank Priscus Shirima. The right 2nd row male was seen on the Msumbugwe savanna. The right lower bird was photographed at TPC-Moshi, courtesy of Hanna Nyman. The 5th row photo was taken near Mererani, courtesy of Per Holmen. The bottom photos were taken in Olasiti; click the photo above to see 8 enlargements.