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Jaroslav Kolecek, Auteur ; Michal Šulc, Auteur ; Radka Piálková, Auteur ; Jolyon Troscianko, Auteur ; Milica Požgayová, Auteur ; Marcel Honza, Auteur ; Petr Procházka, AuteurThe Common Cuckoo (hereafter Cuckoo) shows two adult plumage morphs—adult male plumage is grey and adult females are either grey or, less frequently, rufous. The situation is less clear in juveniles, as both sexes exhibit variable proportions of[...]
Article
Virginia E. Abernathy, Auteur ; Jolyon Troscianko, Auteur ; Naomi E. Langmore, AuteurWhen brood parasites exploit multiple host species, egg rejection by hosts may select for the evolution of host-specific races, where each race mimics a particular host's egg type. However, some brood parasites that exploit multiple hosts with t[...]
Article
Jolyon Troscianko, Auteur ; Lucas A. Bluff, Auteur ; Christian Rutz, AuteurWe report an observation of a wild New Caledonian Crow Corvus moneduloides manufacturing two tools from dry grass stems, and using them to extract lizards from the crevices of a fencepost. We recovered one of the tools and were able to examine t[...]
Article
Jolyon Troscianko, AuteurThe geometrical properties of eggs - such as volume and surface area - have uses ranging from ecological, physiological and morphological studies in birds, to predictions of chick condition in the poultry industry. Although measurements of an eg[...]
