Thomas Custer (Former Employee)
Science and Products
Filter Total Items: 166
Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976 Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976
No abstract available.
Authors
R. G. Osborn, T. W. Custer
Feeding-site description of three heron species near Beaufort, North Carolina Feeding-site description of three heron species near Beaufort, North Carolina
No abstract available.
Authors
T. W. Custer, R. G. Osborn
Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA
Contents of lapland longspur [Calcarius lapponicus] stomachs and esophagi were sampled near Barrow, Alaska [USA], from May-Aug. in 1969, 1971, 1972 and 1973. Data from stomach contents were corrected for differential digestion of prey items. Longspurs shifted seasonally from larval to adult arthropods and back to larvae, responding to changes in the abundance of these prey items. Seeds...
Authors
T. W. Custer, F.A. Pitelka
Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina
Nine species of herons, egrets, and ibises were followed by airplane from a nesting colony near Beaufort, North Carolina to their feeding sites. Except for Cattle Egrets, which flew exclusively to fields and dumps, the birds flew mainly to saltmarsh habitat. The selection of feeding habitats by Great Egrets and Louisiana Herons was directly related to tidal depth. The Great Egret was the...
Authors
Thomas W. Custer, Ronald G. Osborn
Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976 Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976
No abstract available.
Authors
Ronald G. Osborn, Thomas W. Custer
The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina
Nine species of herons were followed to their feeding sites from a nesting colony near Beaufort, North Carolina, by airplane. Except for the Cattle Egret, which flew exclusively to fields and dumps, all other species flew mainly to saltmarsh habitat. In addition, habitats were selected in relation to tidal depth and it appears, at least for the Great Egret, that low tide habitats were...
Authors
Thomas W. Custer
Wading birds as biological indicators: 1975 colony survey Wading birds as biological indicators: 1975 colony survey
No abstract available.
Authors
Thomas W. Custer, Ronald G. Osborn
Wading birds as biological indicators: 1975 colony survey Wading birds as biological indicators: 1975 colony survey
No abstract available.
Authors
Thomas W. Custer, Ronald G. Osborn
Demographic features of a lapland longspur population near Barrow, Alaska Demographic features of a lapland longspur population near Barrow, Alaska
Breeding density, clutch size, hatching and fledging success, and survival of adult Lapland Longspurs (Calcarius lapponicus) were monitored over a 7-year period near the Naval Arctic Research Laboratory, Barrow, Alaska. Nesting begins as soon as the tundra starts to clear of snow and appears to be timed so that the young of the year reach independence before the end of adult insect...
Authors
Thomas W. Custer, Frank A. Pitelka
Snowy owl predation on lapland longspur nestlings recorded on film Snowy owl predation on lapland longspur nestlings recorded on film
During the summer of 1971 I investigated the breeding biology of the Lapland Longspur, Calcarius lapponicus, near Barrow, Alaska. To obtain data on incubation and feeding patterns of nesting longspurs, time-lapse cameras (Minolta Autopak-8 D6 super-8 movie cameras equipped with an Intervalometer-P time-lapse device) were positioned at several nests throughout the nesting season with an...
Authors
T. W. Custer
Science and Products
Filter Total Items: 166
Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976 Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976
No abstract available.
Authors
R. G. Osborn, T. W. Custer
Feeding-site description of three heron species near Beaufort, North Carolina Feeding-site description of three heron species near Beaufort, North Carolina
No abstract available.
Authors
T. W. Custer, R. G. Osborn
Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA
Contents of lapland longspur [Calcarius lapponicus] stomachs and esophagi were sampled near Barrow, Alaska [USA], from May-Aug. in 1969, 1971, 1972 and 1973. Data from stomach contents were corrected for differential digestion of prey items. Longspurs shifted seasonally from larval to adult arthropods and back to larvae, responding to changes in the abundance of these prey items. Seeds...
Authors
T. W. Custer, F.A. Pitelka
Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina
Nine species of herons, egrets, and ibises were followed by airplane from a nesting colony near Beaufort, North Carolina to their feeding sites. Except for Cattle Egrets, which flew exclusively to fields and dumps, the birds flew mainly to saltmarsh habitat. The selection of feeding habitats by Great Egrets and Louisiana Herons was directly related to tidal depth. The Great Egret was the...
Authors
Thomas W. Custer, Ronald G. Osborn
Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976 Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976
No abstract available.
Authors
Ronald G. Osborn, Thomas W. Custer
The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina
Nine species of herons were followed to their feeding sites from a nesting colony near Beaufort, North Carolina, by airplane. Except for the Cattle Egret, which flew exclusively to fields and dumps, all other species flew mainly to saltmarsh habitat. In addition, habitats were selected in relation to tidal depth and it appears, at least for the Great Egret, that low tide habitats were...
Authors
Thomas W. Custer
Wading birds as biological indicators: 1975 colony survey Wading birds as biological indicators: 1975 colony survey
No abstract available.
Authors
Thomas W. Custer, Ronald G. Osborn
Wading birds as biological indicators: 1975 colony survey Wading birds as biological indicators: 1975 colony survey
No abstract available.
Authors
Thomas W. Custer, Ronald G. Osborn
Demographic features of a lapland longspur population near Barrow, Alaska Demographic features of a lapland longspur population near Barrow, Alaska
Breeding density, clutch size, hatching and fledging success, and survival of adult Lapland Longspurs (Calcarius lapponicus) were monitored over a 7-year period near the Naval Arctic Research Laboratory, Barrow, Alaska. Nesting begins as soon as the tundra starts to clear of snow and appears to be timed so that the young of the year reach independence before the end of adult insect...
Authors
Thomas W. Custer, Frank A. Pitelka
Snowy owl predation on lapland longspur nestlings recorded on film Snowy owl predation on lapland longspur nestlings recorded on film
During the summer of 1971 I investigated the breeding biology of the Lapland Longspur, Calcarius lapponicus, near Barrow, Alaska. To obtain data on incubation and feeding patterns of nesting longspurs, time-lapse cameras (Minolta Autopak-8 D6 super-8 movie cameras equipped with an Intervalometer-P time-lapse device) were positioned at several nests throughout the nesting season with an...
Authors
T. W. Custer