Condors and vultures comprise the only group of terrestrial vertebrates in the world that are
obligate scavengers, and these species move widely to locate ephemeral, unpredictable, and patchily-distributed
food resources. In this study, we used high-resolution GPS location data to quantify
monthly home range size of the critically endangered California...
This species key to female bumble bees of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 27 species which occur or have occurred historically, and may still be present in the region. The key architecture is based strongly on the key to species for females found...
This species key to male bumble bees of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 27 species which occur or have occurred historically, and may still be present in the region. The key architecture is based strongly on the key to species for males found...
This key to the bee genera of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 60 genera of bees which occur or may occur in the region. The key architecture is based strongly on the key to the genera of North and Central America published in...
1. Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic-pituitary axis functioning, whether its expression trades off with growth, and the degree to which these -relationships vary between species.
2. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic...
Multiple parasitism of host nests by generalist brood parasites reflects the decisions of laying females and may influence the development and behavior of parasitic young. We used microsatellite and mtDNA control-region haplotype data to examine the relatedness of Brown-headed Cowbird (Molothrus ater) offspring in multiply parasitized nests sampled from a...
Condors and vultures are distinct from most other terrestrial birds because they use extensive soaring flight for their daily movements. Therefore, assessing resource selection by these avian scavengers requires quantifying the availability of terrestrial-based habitats, as well as meteorological variables that influence atmospheric conditions necessary for soaring. In this study,...
Condors and vultures are distinct from most other terrestrial birds because they use extensive soaring flight for their daily
movements. Therefore, assessing resource selection by these avian scavengers requires quantifying the availability of
terrestrial-based habitats, as well as meteorological variables that influence atmospheric conditions necessary for soaring. In
this study,...
Condors and vultures are distinct from most other terrestrial birds because they use extensive soaring flight for their daily
movements. Therefore, assessing resource selection by these avian scavengers requires quantifying the availability of
terrestrial-based habitats, as well as meteorological variables that influence atmospheric conditions necessary for soaring. In
this study,...
Large-scale poisoning events are common to scavenging bird species that forage communally,
many of which are in decline. To reduce the threat of poisoning and compensate for other persistent threats,
management, including supplemental feeding, is ongoing for many reintroduced and endangered vulture
populations. Through a longitudinal study of lead exposure...