Because of its profound effects on the rates of biological processes such as aerobic
metabolism, environmental temperature plays an important role in sha** the distribution …

Defining the impacts of anthropogenic climate change on biodiversity and species
distributions is currently a high priority. Niche models focus primarily on predicted changes …

Migration, broadly defined as directional movement to take advantage of spatially distributed
resources, is a dramatic behaviour and an important component of many life histories that …

Migration is one of the most energy-demanding behaviors observed in birds. Mitochondria
are the primary source of energy used to support these long-distance movements, yet how …

Hybridization is increasingly recognized as a significant evolutionary process, in particular
because it can lead to introgression of genes from one species to another. A striking pattern …

Abstract Theory and empirical patterns suggest a disproportionate role for sex chromosomes
in evolution and speciation. Focusing on ZW sex determination (females ZW, males ZZ; the …

Diversifying selection on metabolic pathways can reduce intraspecific gene flow and
promote population divergence. An opportunity to explore this arises from mitonuclear …

During migration, long-distance migratory songbirds may fly nonstop for days, whereas
shorter-distance migrants complete flights of 6 to 10 h. Fat is the primary fuel source, but …

Eukaryotes were born of a chimeric union between two prokaryotes—the progenitors of the
mitochondrial and nuclear genomes. Early in eukaryote evolution, most mitochondrial genes …

The avian world is packaged into genetic assemblages that we call species. Although
ornithologists can, with a few important exceptions, agree on the boundaries among avian …