Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16736
Fifty-fifth Christmas Bird Count. 159. Ocean City, Md Fifty-fifth Christmas Bird Count. 159. Ocean City, Md
The distribution of dynamic pressure behind a Harris' hawk's wing was sampled using a wake rake consisting of 15 pitot tubes and one static tube. The hawk was holding on to a perch, but at an air speed and gliding angle at which it was capable of gliding. The perch was instrumented, so that the lift developed by the wing was known and the lift coefficient could be calculated. The mean of...
Authors
C.J. Pennycuick, C.E. Heine, S.J. Kirkpatrick, M.R. Fuller
New and noteworthy bird records from Belize New and noteworthy bird records from Belize
No abstract available.
Authors
S.N.G. Howell, B.A. Dowell, D.A. James, R.A. Behrstock, C.S. Robbins
Trends and management of wolf-livestock conflicts in Minnesota Trends and management of wolf-livestock conflicts in Minnesota
The nature and extent of wolf-livestock conflicts in Minnesota during 1975-86 was studied as part of a wolf depredation control program. The level of wolf (Canis lupus) depredation on livestock in Minnesota, as determined from the total number of complaints verified annually during 1975-86, showed a slight upward trend but did not increase significantly. A significant portion of the...
Authors
S. H. Fritts, W.J. Paul, L.D. Mech, D.P. Scott
Reintroduction as a conservation strategy for parrots Reintroduction as a conservation strategy for parrots
No abstract available.
Authors
J. W. Wiley, N.F.R. Snyder, R.S. Gnam
Organochlorines and heavy metals in the Bering-Chukchi Sea ecosystems Organochlorines and heavy metals in the Bering-Chukchi Sea ecosystems
No abstract available.
Authors
C.P. Rice, S.M. Chernyak, D. Hinckley, A. Krynitsky, T. Kolobova
Effects of extended photoperiod on sandhill crane reproduction Effects of extended photoperiod on sandhill crane reproduction
Photoperiod studies were conducted with greater sandhill cranes (Grus canadensis tabida) from 1969 to 1972 and from 1982 to 1987 at the Patuxent Wildlife Research Center, Maryland. When housed indoors and exposed to long photoperiods, males produced semen during winter. When exposed to artificially extended photoperiods during spring in outdoor pens, females apparently laid earlier in...
Authors
G.F. Gee, G.W. Pendleton
Quantity and distribution of plastics: An analysis of chemical hazards to marine life Quantity and distribution of plastics: An analysis of chemical hazards to marine life
No abstract available.
Authors
G. J. Smith, C. J. Stafford
Progress in satellite tracking cranes Progress in satellite tracking cranes
We review the history of tracking cranes with satellite telemetry and identify some of the difficulties in designing satellite transmitters and harnesses for cranes. Miniaturization of these transmitters and a plethora of harnessing experiments since 1989 allow us to recommend limited application of this technology to all species of cranes. We are still uncertain, however, if cranes...
Authors
D. H. Ellis, D.G. Smith, Glenn H. Olsen, M.R. Fuller, S.E. Landfried, H. Higuchi, C.H. Vermillion
Sampling considerations involved with monitoring the nutritional status of gray wolves Canis lupus via biochemical analysis of snow-urine Sampling considerations involved with monitoring the nutritional status of gray wolves Canis lupus via biochemical analysis of snow-urine
No abstract available.
Authors
G. D. DelGiudice, J. Stone, L.D. Mech, U.S. Seal
Prevention of eastern equine encephalitis virus in captive cranes Prevention of eastern equine encephalitis virus in captive cranes
No abstract available.
Authors
J. W. Carpenter, D.M. Watts, C.L. Crabbs, G.G. Clark, T.W. Scott, D. Docherty, B.B. Pagac, J.M. Dorothy, J.G. Olson, F. J. Dein
Characteristics of snowy plover (Charadrius alexandrinus) nest sites on agricultural drainwater evaporation ponds in the San Joaquin valley, California Characteristics of snowy plover (Charadrius alexandrinus) nest sites on agricultural drainwater evaporation ponds in the San Joaquin valley, California
No abstract available.
Authors
D. A. Barnum, W.L. Hohman, D.L. Roster
Comparison of neotropical migrant landbird populations wintering in tropical forest, isolated forest fragments, and agricultural habitats Comparison of neotropical migrant landbird populations wintering in tropical forest, isolated forest fragments, and agricultural habitats
Neotropical migrant bird populations were sampled at 76 sites in seven countries by using mist nets and point counts during a six-winter study. Populations in major agricultural habitats were compared with those in extensive forest and isolated forest fragments. Certain Neotropical migrants, such as the Northern Parula, American Redstart, and the Black-throated Blue, Magnolia, Black-and...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, J.A. Colon, R. Estrada, A. Sutton, R. Sutton, Dieter Weyer