We used mitochondrial DNA sequence data from 151 individuals to estimate population
genetic structure across the range of the Western Diamondback Rattlesnake (Crotalus …

Long-term studies of individual animals in nature contribute disproportionately to our
understanding of the principles of ecology and evolution. Such field studies can benefit …

Investigating secondary contact of historically isolated lineages can provide insight into how
selection and drift influence genomic divergence and admixture. Here, we studied the …

Differences in resource availability and quality along environmental gradients are important
influences contributing to intraspecific variation in body size, which influences numerous life …

Immune function can vary based on availability of resources, and most studies of such
influences have focused on the co-investment of energy into immune and other …

Maximum gape is important to the ecology and evolution of many vertebrates, particularly
gape‐limited predators, because it can restrict the sizes and shapes of prey that can be …

For various reasons, reduction or cessation of feeding (anorexia) can occur in either sex
during periods of reproduction among vertebrates, from cichlids to elephant seals. Anorexia …

In many species of snakes, particularly viperids from temperate regions, production of
offspring by individuals occurs on a less‐than‐annual schedule. Accordingly, acquiring …

Abstract Northern Pacific Rattlesnakes (Crotalus oreganus) are ambush-hunting predators
that rely on crypsis to forage and to avoid encounters with predators, yet little is known about …

Here we report, for the first time, a natural hybrid between Crotalus atrox and C.
mictlantecuhtli based on intermediate characteristics of the external morphology and venom …