Black-Throated Gray Warbler - A Saskatchewan First
نویسندگان
چکیده
منابع مشابه
PARENTAL CARE IN ThE MULTI-BROODED BLACk-ThROATED BLUE WARBLER
reprintInfo.asp. DOI: 10.1525/cond.2009.080072 Resumen. La maximización del rendimiento reproductivo generalmente implica un balance de costos y beneficios entre el gasto de energía para los intentos reproductivos en el presente y el ahorro de energía para oportunidades reproductivas futuras. Para las especies con cuidado biparental, la energía gastada en un intento reproductivo no sólo represe...
متن کاملQuestions raised by the consumption of cane sugar by a Black-throated Blue Warbler (Setophaga caerulescens)
I address questions raised by an observation of a Black-throated Blue Warbler (Setophaga caerulescens) eating unrefined granulated cane sugar in Kingston, Jamaica. Sugar consumption implies the presence of taste receptors sensitive to sucrose and digestive sucrase activity sufficient to assimilate highly concentrated sucrose solutions. The ability to efficiently digest disaccharides, such as su...
متن کاملWarm Springs, Early Lay Dates, and Double Brooding in a North American Migratory Songbird, the Black-Throated Blue Warbler
Numerous studies have correlated the advancement of lay date in birds with warming climate trends, yet the fitness effects associated with this phenological response have been examined in only a small number of species. Most of these species--primarily insectivorous cavity nesters in Europe--exhibit fitness declines associated with increasing asynchrony with prey. Here, we use 25 years of demog...
متن کاملTerritorial Movements of Black-throated Blue Warblers in a Landscape Fragmented by Forestry
—Many forest bird species show inhibition to entering open areas, including crossing habitat gaps. We examined the responses of Blackthroated Blue Warblers (Dendroica caerulescens) to conspecific song playback within forest, at clearcutforest ecotones, and across logging roads to assess movements of this Neotropical migrant into open areas. Males responded readily to song playbacks in all areas...
متن کاملFactors affecting aural detections of songbirds.
Many factors affect the number of birds detected on point count surveys of breeding songbirds. The magnitude and importance of these factors are not well understood. We used a bird song simulation system to quantify the effects of detection distance, singing rate, species differences, and observer differences on detection probabilities of birds detected by ear. We simulated 40 point counts cons...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1965
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay3304