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The Evolution of Normal and Reverse Sexual Size Dimorphism in Shorebirds and other Birds
The shorebirds (Charadriiformes: suborders Charadrii and Scolopaci) seem an ideal group for evaluating the role of natural and sexual selection in the evolution of sexual size dimorphism. ShorebirdsExpand
GEOGRAPHIC VARIATION AND REASSESSMENT OF SPECIES LIMITS IN THE "MASKED" BOOBIES OF THE EASTERN PACIFIC OCEAN
Two distinct forms of Masked Booby (S&a dactyl&-a) occur in the eastern Pacific: (1) a yellow-billed form that includes a population on Clipper-ton Island and islands off western Mexico (S. d. "cal-Expand
Rapid Atrophy and Hypertrophy of an Avian Flight Muscle
TLDR
Eared Grebes use Mono Lake in eastern California as a rest stop during spring migration, but there the birds become obese by feeding on invertebrates and, if they have not already done so, molt, and most grebes remain several months until a decline in prey populations stimulates further migration. Expand
Cyclical changes in body composition in the annual cycle and migration of the Eared Grebe Podiceps nigricollis
TLDR
Several lines of evidence suggest that grebes attain a specific (optimal?) body composition prior to migrating, and these reductions in leg and visceral mass, which occur in all seasons, reduce flight costs by minimizing wing loading and enhancing flight speed. Expand
Reproductive Failures of Double-Crested Cormorants in Southern California and Baja California
TLDR
Double-crested Cormorants in southern California and northwestern Mexico typically nest on steep rocky slopes or hillsides among Brown Pelicans, and may suffer heavy losses of eggs to gull predation. Expand
Aspects of the Molt Migration
TLDR
Salomonsen (1968) viewed this movement as distinct from the start of fall migration because it involved birds moving from the breeding grounds to a special molting area, where they could rapidly replace their flight feathers at low risk from predation before resuming their flight to the winter quarters. Expand
Total Body Water and Body Composition in Phalaropes and Other Birds
Contrary to some reviews, total body water (TBW) may fall below the expected value of about 65% in birds if measured as a percentage of total body mass. However, water constitutes a relatively stableExpand
The Status of the Avifauna of the Revillagigedo Islands, Mexico
TLDR
The results of two expeditions to the Revillagigedo Islands in 1978 and 1981 are reviewed and data that amplify the findings of Brattstrom and Howell (1956) are presented. Expand
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