Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16784
Wolf howling and its role in territory maintenance
An experimental study of the role of howling in wolf territory maintenance was conducted in the Superior National Forest, Minnesota. Vocal replies and behaviour of radio-collared wolves in response to human howls were analyzed for eight packs and 10 lone wolves during a 2-year period. Reply rate varied significantly throughout the year. A mid-winter increase was correlated with the breeding season
Authors
F.H. Harrington, L. D. Mech
Primary feather molt of adult mourning doves in North and South Carolina
Examination of 8,141 adult mourning doves (Zenaida macroura) in North and South Carolina revealed that substantial numbers complete primary feather molt in September. Adult mourning doves shed primaries at the rate of 1 per 14 days. No difference was found in this rate between sexes or among years, 1969-74. The initiation of molt differed from year to year, and female molt always preceded male m
Authors
G.H. Haas, S.R. Amend
Some observations on the behavior of captive bald eagles before and during incubation
No abstract available.
Authors
P.N. Gerrard, Stanley N. Wiemeyer, J.M. Gerrard
Preliminary evaluation of a national wildlife and fish data base
No abstract available.
Authors
T.W. Hoekstra, D.L. Schweitzer, C.T. Cushwa, S.H. Anderson, R.B. Barnes
Weights of lesser snow geese taken on their winter range
No abstract available.
Authors
Edward L. Flickinger, E.G. Bolen
Review of buff-breasted sandpiper records in the Central Pacific
No abstract available.
Authors
R. B. Clapp
Correct citations for some North American bird taxa
No abstract available.
Authors
R.C. Banks, M.R. Browning
Sex-specific differences in winter distribution patterns of canvasbacks
No abstract available.
Authors
G. M. Haramis, J. D. Nichols
Disseminated granulomas caused by an unidentified protozoan in sandhill cranes
Oral granulomas were observed in 31 (33%) of 95 captive sandhill cranes (Grus canadensis) at the Patuxent Wildlife Research Center. Necropsy of six of the afflicted cranes revealed granulomatous nodules throughout many of their organ systems. Intracellular protozoan organisms morphologically resembling schizogonic stages were observed within the granulomas by light and electron microscopy. Sexual
Authors
J. W. Carpenter, T.R. Spraker, C.H. Gardiner, M.N. Novilla
Effects of Corexit 9527 on the hatchability of mallard eggs
No abstract available.
Authors
P.H. Albers