It is distinguished from the sympatric American crocodile by its broader snout, with overlapping jaws and darker coloration, and is less tolerant of saltwater but more tolerant of cooler climates than the American crocodile, which is found only in tropical climates.
Visual inspection of the presence of lichen species and coloration in biocrusts is a strong indicator of biocrust community structure and function across the cool desert regions of the western U.S. (Barger et al. 2005; Belnap et al. 2008).
Such a pattern could on principle be adaptive, as it might enable higher levels of activity during spells of unfavourably cool weather or in the cool dry season (although butterflies seem to rely in the first place on their cryptic coloration here, thus avoiding unnecessary flight [33], [53]).
Their coloration is revealing.
Their coloration is camouflaging.
Not all coloration requires pigments.
Structural coloration in a fossil feather.
Languid charm alternates with vivid coloration.
