Wing length canalisation and behaviour across birds: a phylogenetic meta-analysis of variance.

Abstract excerpt

We examined the expectation that stronger stabilising selection leads to a decrease in trait variation across species by investigating individual variation in wing length. We hypothesised that species that heavily rely on aerial feeding, as well as long-distance migratory species, show higher canalisation (lower coefficients of variation, i.e., CV values) in wing length than non-aerial feeders and non-migratory...

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