Gray Kingbird (Tyrannus dominicensis)

@article{Smith2002GrayK,
  title={Gray Kingbird (Tyrannus dominicensis)},
  author={Gregory A. Smith and Jerome A. Jackson and Aaron K. Poole and Frank B. Gill},
  journal={The Birds of North America Online},
  year={2002}
}
1 Citations
Diurnal and Nocturnal Birds Vocalize at Night: A Review
TLDR
Lack of significant phylogenetic signal suggests that nocturnal vocalizations are not merely a result of phylogeny, which leaves ecological factors such as elevated light levels and mated status as potential promoters of its occurrence. Expand