Not like night and day: the nocturnal letter-winged kite does not differ from diurnal congeners in orbit or endocast morphology

  title={Not like night and day: the nocturnal letter-winged kite does not differ from diurnal congeners in orbit or endocast morphology},
  author={Aubrey Keirnan and Trevor H. Worthy and Jeroen B. Smaers and Karine Mardon and Andrew N. Iwaniuk and Vera Weisbecker},
  journal={Royal Society Open Science},
Nocturnal birds display diverse adaptations of the visual system to low-light conditions. The skulls of birds reflect many of these and are used increasingly to infer nocturnality in extinct species. However, it is unclear how reliable such assessments are, particularly in cases of recent evolutionary transitions to nocturnality. Here, we investigate a case of recently evolved nocturnality in the world's only nocturnal hawk, the letter-winged kite Elanus scriptus. We employed phylogenetically… 

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