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. 2017 Apr 5;372(1717):20160064. doi: 10.1098/rstb.2016.0064

Figure 1.

Figure 1.

Some examples of visual signals in crepuscular and nocturnal birds (upper photos) and mammals (lower photos). From left to right and up to down: the white badge on the eagle owl Bubo bubo throat (V. Penteriani), which is inflated during vocalizations; the white patches on the throat, wings and tail of a common nighthawk Chordeiles minor (123RF royalty free stock photos, http://www.123rf.com, image ID 35701390, copyright: Steve Byland), particularly visible during flying displays at twilight; the white feathers exhibited by the great bustard Otis tarda during displays at dusk and dawn (123RF royalty free stock photos, http://www.123rf.com, image ID 37058799, copyright: byrdyak); the mask of a European badger Meles meles (123RF royalty free stock photos, http://www.123rf.com, image ID 28445502, copyright: Michael Lane); the combination of black-and-white marks in the fur of the striped skunk Mephitis mephitis (123RF royalty free stock photos, http://www.123rf.com, image ID 7734416, copyright: Shirley Palmer); and the contrasting neck and tail of the Indian civet Viverra zibetha (123RF royalty free stock photos, http://www.123rf.com, image ID 9220957, copyright: panda3800).