Black-throated Blue Warbler in Sask.
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...
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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...
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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 کاملPopulation density affects foraging behavior of male Black-throated Blue Warblers during the breeding season
Foraging behavior often reflects food availability, a resource that may increasingly limit breeding birds as intraspecific crowding increases. Measuring foraging behavior, therefore, provides a way to investigate effects of population density on food limitation, an important link in understanding how crowding functions to regulate populations. We quantified three components of foraging behavior...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1956
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1913