“Predicted probabilities of deformities occurrence in pigeons’ foot according to … the density of hairdressers (quadratic effect)” is one aspect of the study “Urban pigeons losing toes due to human activities“, which is featured in the column “Pigeons Research Review” in the special Gulls, Crows, Pigeons, Woodpeckers issue (volume 29, number 5) of the magazine Annals of Improbable Research.
Pigeons’ toes and hairdressers
