The White-breasted Thrasher (Ramphocinclus brachyurus) is endemic to the coastal dry forests of St. Lucia, and is currently restricted in its range to two areas along the eastern coast. Recent population estimates from researchers working on this species put the global population around 1,500 birds. Based on recent surveys, it is believed nearly three-fourths of […]
Tropical Mockingbird (Mimus gilvus) Science Article 2 abstract A time and energy budget of male and female Mockingbirds (Mimus polyglottos) in six phases of their breeding cycle was completed using the equivalent temperature model to predict perching metabolic rates. Recorded time-budget behaviors included perching, bipedal locomotion, flight, and the time spent in the sun and […]
Tropical Mockingbird (Mimus gilvus) Science Article 1 abstract Like many passerine species, the Mockingbird (Mimus polyglottos) is thought to be highly monogamous. Laskey (1935, Auk 52: 370), for example, reports perennial pair bonding between identified males and females, even though the female may leave for the fall and return to the same male during the […]
Tropical Mockingbird (Mimus gilvus) Science Article 3 abstract I passed the interval from 15 March to 24 July 1966 at ‘La Araguata,’ a large cattle farmsituated among the hills near Pirapira, some 20 miles south of Valencia in the state ofCarabobo, Venezuela. Although most of my time was devoted to the study of the RufousfrontedThornbird […]
Tropical Mockingbird (Mimus gilvus) Science Article 4 abstract Se reportan dos nuevas localidades para el Sinsonte Colilargo Mimus gilvus en Ecuador. Junto aestos registros la especie es conocida por cuatro observaciones en el pais, todas ubicadas en losAndes del norte de Ecuador. Se sugiere que Mimus gilvus puede estar extendiendo su rango dedistribucion desde Colombia, […]
Grey Catbird (Dumetella carolinensis) Science Article 2 abstract Polygyny occasionally occurs in passerine species that are generally socially monogamous.We document the second case of polygynous mating in the Gray Catbird (Dumetella carolinensis) and provide the first detailed account of this behavior. Daniel Hanley et al., The Wilson Journal of Ornithology 119(3):499-502, 2007 Download article download […]
Grey Catbird (Dumetella carolinensis) Science Article 4 abstract We determined the prevalence and intensity of blood parasites in breeding graycatbirds (Dumatella carolinensis) at Killbuck Wildlife Area in Wayne and Holmes Counties, Ohio(USA) from June through August 2000. Of 98 catbirds sampled, 40 (40.8%) had detectableinfections of Haemoproteus beckeri. Overall prevalence of H. beckeri in this […]
Grey Catbird (Dumetella carolinensis) Science Article 5 abstract Although Howell (1932) stated that the Gray Catbird (Dumetella carolinensis) ‘breeds sparingly in northern and central Florida,’ some recent field workers in this state have viewed his statement skeptically. Of Howell’s seven references to Florida breeding, four were made by Oscar Baynard, some of whose records of’ […]
Grey Catbird (Dumetella carolinensis) Science Article 3 abstract The gray catbird (Dumetella carolinensis) has been documented visiting and breakingthe eggs of artificial nests, but the implications of such observations are unclear because there is little cost in depredating an undefended nest. During the summer of 2001 at Konza Prairie Biological Station, Kansas, we videotaped a […]
Brown Thrasher (Toxostoma rufum) Science Article 10 abstract A common trend in neuroscience is convergence on selected model systems. Underlying this approach is an often implicit assumption that mechanisms observed in one species are characteristic of all related species. Although themodel systemapproach has been extremelyproductive, itmight not account for all of themechanistic differences between species […]