Results 111 to 120 of about 680 (164)

Lack of response to conspecific juvenile vocalizations in two avian brood parasites. [PDF]

Curr Zool
Prieto R, De Mársico MC, Reboreda JC, Scardamaglia RC.   +3 more
europepmc   +1 more source

Tick infestation of birds in grasslands experiencing woody plant encroachment in the United States Great Plains. [PDF]

J Med Entomol
Taylor TC, Propst JD, Noden BH, Loss SR.
europepmc   +1 more source

Host use by sympatric cowbirds (Molothrus aeneus and M. ater)

, 2005
openaire   +1 more source

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Arthropod Parasites of the Brown-Headed Cowbird, Molothrus Ater Ater, in Ohio

Journal of Medical Entomology, 1974
Prior to this study, no intensive investigations had been undertaken to determine the arthropod parasites of the Brown-headed Cowbird. Records of the arthropod fauna of this host are limited to surveys of bird ectoparasi tes covering a number of host species. These include Bishop & Trembley (1945, J. Parasitol. 37 : 1–54), Geist (1931, Ohio J. Sci. 31 :
C L, Cooper, E L, Troutman
openaire   +2 more sources

Hosts of the Cowbird Molothrus ater Obscurus

Auk, 1938
exaly   +2 more sources

Song Sharing in the Brown-Headed Cowbird (Molothrus ater)

Zeitschrift Für Tierpsychologie, 1985
Abstract and SummarySongs were recorded from two separate populations of brown‐headed cowbirds (Molothrus ater). High levels of song sharing were found in each and, in one population, paired males shared more song types than did the remainder of the population.
Alfred M Dufty
exaly   +2 more sources

In the company of cowbirds, Molothrus ater ater: Robust patterns of sociability predict reproductive performance.

Journal of Comparative Psychology, 2013
Many species exhibit behavioral tendencies that are stable over time and across contexts. Robust variation in sociability, or the propensity to approach others, is widespread across the vertebrates. Nonetheless, the influence of sociability on reproductive performance is largely unknown.
Gregory M, Kohn, Andrew P, King, Rebekka, Dohme, Gwendŵr R, Meredith, Meredith J, West   +4 more
openaire   +2 more sources

Nest Protection by the Brown-Headed Cowbird (Molothrus ater)

Auk, 1968
Russell P Balda
exaly   +2 more sources

Estrogen Synthesis and Secretion in the Brown-Headed Cowbird (Molothrus ater)

General and Comparative Endocrinology, 1997
Estrogens exert profound effects on vertebrate physiology and behavior. In most vertebrates, including birds, estrogens derived from ovarian tissue circulate at high levels during discrete periods of reproductive activity, and estrogen levels in males are low. In some songbirds (Passeriformes) plasma estrogens are high in both males and females. In the
C J, Saldanha, B A, Schlinger
openaire   +2 more sources

Vocalizations of juvenile cowbirds (Molothrus ater ater) evoke copulatory responses from females

Developmental Psychobiology, 1988
AbstractThe functional attributes of the vocalizations produced by young male cowbirds during their first fall and winter, termed “vocal precursors,” were tested by playing the sounds back to female cowbirds. Five classes of vocalizations were tested: subsong, plastic, formatted, and stereotyped song, and songs of nonconspecifics.
M J, West, A P, King
openaire   +2 more sources