Caspian Tern (Sterna caspia) Science Article 2 abstract Nesting distribution, age-related seasonal movements, survivorship, and mechanisms of population expansion in Pacific Coast Caspian Terns (Sterna caspia) were examined primarily through analysis of 412 recoveries of birds banded as juveniles between 1935 and 1980. Since the beginning of this century, the population has shifted from nesting […]

Caspian Tern (Sterna caspia) Science Article 1 abstract We investigated factors affecting chick provisioning by radio-tagged Caspian Terns (Sterna caspia)nesting in a large colony on East Sand Island in the Columbia River estuary during 2001. Caspian Tern predationon juvenile salmonids (Oncorhynchusspp.) in the estuary prompted resource managers to relocate ca. 9,000 pairs ofterns nesting on […]

Caspian Tern (Sterna caspia) Science Article 3 abstract We examined spatial and temporal foraging patterns of Caspian terns and double-crested cormorants nesting in the ColumbiaRiver estuary, to potentially identify circumstances where juvenile salmonids listed under the U.S. Endangered Species Act mightbe more vulnerable to predation by these avian piscivores. Data were collected during the 1998 […]

Brown Noddy (Anous stolidus) Science Article 6 abstract The physical circulation in the Western Indian Ocean controls the supply of nutrients, and this, combined with the stability of the surface layer and the availability of sunlight controls the primary production. In this note, we review two papers’ findings on how the physical conditions ultimately impact […]

Brown Noddy (Anous stolidus) Science Article 3 abstract Three steps are necessary in the study of avian vocal repertoires (aside from developmental and physiological aspects) (.1) The various vocalizations and the situations (context) under which they are given must be identified and described under natural conditions. The description should be objective enough so the calls […]

Brown Noddy (Anous stolidus) Science Article 4 abstract Flotation characteristics of birds’ eggs are commonly used to estimate their age. Schreiber (1970) and Hays and LeCroy (1971) have recently attempted to quantify the relationship between the appearance (degree of emergence and position) larid eggs placed in water and the age of the eggs. William Y. […]

Brown Noddy (Anous stolidus) Science Article 5 abstract Despite its abundance and pantropical range, little published information exists on the longevity of the Brown Noddy (Anous stolidus). Woodward (atoll Research Bull., 164: 280, 1972) reported a maximum known survival of 10 years for Brown Noddies banded as adults onKure Atoll, Hawaii. William Y. Brown, Bird […]

Brown Noddy (Anous stolidus) Science Article 2 abstract The Brown Noddy (Anous stolidus) breeds in the tropics and subtropics as far north as the northern Bahamas and the Dry Tortugas, Florida. In winter it stays in warm tropical or subtropical waters, usually within 100 km of nesting colonies (Chardine and Morris 1996). Will Post et […]

Brown Noddy (Anous stolidus) Science Article 1 abstract Davies and Carrick (1962) suggested that adults should distinguish their own young from offspring of neighboring conspecifics by the time their young become mobile enough to leave the nest and mix with other youngbirds. The influence of the type of nest in shaping recognition behavior is illustrated […]