Data for: Egg mimicry, not the sight of a common cuckoo, is the cue for parasitic egg rejection

We video recorded natural common cuckoo (Cuculus canorus) parasitism at great reed warbler (Acrocephalus arundinaceus) nests and calculated mimicry of cuckoo eggs. Then we used generalised linear mixed models (GLMM) to investigate whether seeing the cuckoo female at the nest and cuckoo egg mimicry affect host rejection behaviour.