Common cuckoo and warbler eggshells undergo similar levels of eggshell thinning Peer-Reviewed Publication. The City University of New York ...

Common cuckoo, warbler eggshells undergo similar levels of eggshell thinning. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2016 / 10 / 161027123453.htm.

When reed warblers spot a cuckoo, they may mob it and emit alarm calls that carry up to 40 metres. These alarm calls attract neighbours, who come to investigate the cause of the commotion.

When reed warblers spot a cuckoo, they may mob it and emit alarm calls that carry up to 40 metres. These alarm calls attract neighbours, who come to investigate the cause of the commotion.

This call keeps the frightened reed warbler mother away for a bit longer, affording the cuckoo more time in the host’s nest, and a greater chance of succeeding at the deception.

Keith Bannister's shot of a sedge warbler taking on a cuckoo, taken from a hide at 5.30am in York, has won the Society of International Nature and Wildlife Photographers' Living World competition.

Common cuckoo and warbler eggshells undergo similar levels of eggshell thinning. by The City University of New YorkThe City University of New York ...

When reed warblers spot a cuckoo, they may mob it and emit alarm calls that carry up to 40 metres. These alarm calls attract neighbours, who come to investigate the cause of the commotion.