Polymorphisms of the juvenal plumage in birds have received little study in comparison to other plumages. We investigate a polymorphism in the juvenal plumage of the Yellow Warbler (Setophaga petechia) in southeastern Ontario, Canada. Yellow Warblers in juvenal...
To test this, we exposed dogbane tiger moths (Cycnia tenera) to a recording of the echolocation sequence emitted by a big brown bat (Eptesicus fuscus) as it attacked a stationary target. Our results demonstrate that, at normal echolocation intensities, C...
Analysis of the clicks produced by some arctiid moths shows that their acoustic characteristics (power spectra and frequency–time structures) are remarkably similar to those of frequency-modulated echolocation calls produced by many bats as they close with their prey. We suspect...
