Publications
The USGS publishes peer-reviewed reports and journal articles which are used by Chesapeake Bay Program resource managers and policy makers to make science-based decisions for ecosystem conservation and restoration. Use the Search box below to find publications on selected topics.
If you wish to search by author, click the button below to be directed to USGS Publications Warehouse.
Filter Total Items: 942
The winter bird survey of central Maryland, U.S.A The winter bird survey of central Maryland, U.S.A
A method for monitoring changes in winter bird populations was tested in central Maryland in the winters of 1970, 1971 and 1972. A systematic sample of 41 transects was established to sample an area of 6150 sq. km. Each transect, located at the center of a standard 7 1/2-minute topographic map, was 8 km in length and approximately square in shape. Coverage began at local sunrise on any...
Authors
C.S. Robbins, D. Bystrak
The breeding bird atlas of Montgomery County, Maryland, USA The breeding bird atlas of Montgomery County, Maryland, USA
A two-year Breeding Bird Atlas program for Montgomery County was undertaken by the Maryland Ornithological Society in 1971-1972. The county was divided into 65 5 km blocks and each block was assigned to an observer. Preliminary results show 46 to 93 species (mean 66) recorded per 5 km block and from 10 to 52 species (mean 28) confirmed per block. When the data are combined into 10 km...
Authors
M. K. Klimkiewicz, C.S. Robbins
Red-cockaded woodpecker near Bowie, Maryland Red-cockaded woodpecker near Bowie, Maryland
No abstract available.
Authors
B. Meanley, Matthew C. Perry
Territorial behavior, pesticides, and the population ecology of red-shouldered hawks in central Maryland, 1943-1971 Territorial behavior, pesticides, and the population ecology of red-shouldered hawks in central Maryland, 1943-1971
A breeding population of red—shouldered hawks (Buteo lineatus) along the Patuxent River in central Maryland was studied during the interval 1943—71. Numbers of breeding pairs remained unchanged or increased on the PWRC (Patuxent Wildlife Research Center) and an adjoining area where habibat was not altered. A reduction in breeding pairs occurred on the third study area where large...
Authors
Charles J. Henny, F. C. Schmid, Elwood M. Martin, L. L. Hood
February nesting of mourning doves near Laurel, Maryland February nesting of mourning doves near Laurel, Maryland
No abstract available.
Authors
B. Meanley