scholarly journals The Cerulean Warbler (Dendroica cerulea) in the Catskills

The Auk ◽  
1919 ◽  
Vol 36 (4) ◽  
pp. 582-583 ◽  
Author(s):  
S. Harmsted Chubb
Keyword(s):  
Dendroica Cerulea ◽  
Cerulean Warbler

Cerulean Warbler (Dendroica Cerulea) Microhabitat and Landscape-Level Habitat Characteristics in Southern West Virginia

The Auk ◽  
2005 ◽  
Vol 122 (2) ◽  
pp. 497-508 ◽  
Author(s):  
Cathy A. Weakland ◽  
Petra Bohall Wood
Keyword(s):  
West Virginia ◽  
Forest Fragmentation ◽  
Microhabitat Use ◽  
Dendroica Cerulea ◽  
Cerulean Warbler ◽  
Open Canopy ◽  
Territory Density ◽  
Cerulean Warblers ◽  
Mountaintop Mining ◽  
Spot Mapping

AbstractThe Cerulean Warbler (Dendroica cerulea) is a species of conservation concern in eastern North America, where declines in its population have been documented over the past several decades. A high proportion of the population occurs in forested areas of southern West Virginia, where it may be threatened by loss and degradation of forested habitat from mountaintop mining and valley fill (MTMVF). We examined, from a landscape perspective, the effects of forest fragmentation (in particular, effects of fragment size and response to edges) on Cerulean Warblers, using territory mapping techniques and geographic information system (GIS) technology in portions of four counties in southwestern West Virginia. We quantified landscape characteristics from digitized aerial photographs and measured microhabitat characteristics on spot-mapping plots. Territory density of Cerulean Warblers was 4.6 territories per 10 ha in intact forest and 0.7 territories per 10 ha in fragmented forest. The best habitat model included both landscape and microhabitat variables and indicated that territory density increased with increasing snag density, percentage of canopy cover >6–12 m and >24 m in height, and distance from mine edge. Models for predicting microhabitat use at the territory level were weak, indicating that microhabitat characteristics of territories were similar to habitat available on spot-mapping plots. The species did not appear to avoid internal edges, such as natural canopy gaps and open-canopy or partially open-canopy roads. Territory placement on ridges was greater than expected, and in bottomlands (ravines) and midslopes less than expected, given availability. Fifty percent of all territories were on ridges. Preference for ridges suggests that MTMVF may have a greater effect on Cerulean Warbler populations than other sources of forest fragmentation, given that ridges are removed in MTMVF. Our data indicate that Cerulean Warblers are negatively affected by mountaintop mining from loss of forested habitat, particularly ridgetops, and from degradation of remaining forests, as evidenced by lower territory density in fragmented forests and lower territory density closer to mine edges.

scholarly journals Sociality and Foraging Behavior of the Cerulean Warbler in Venezuelan Shade-Coffee Plantations

The Condor ◽  
2000 ◽  
Vol 102 (4) ◽  
pp. 958-962 ◽  
Author(s):  
Jason Jones ◽  
Paolo Ramoni Perazzi ◽  
Erin H. Carruthers ◽  
Raleigh J. Robertson
Keyword(s):  
Foraging Behavior ◽  
Territory Size ◽  
Flock Size ◽  
Adult Males ◽  
Shade Coffee ◽  
Coffee Plantations ◽  
Dendroica Cerulea ◽  
Cerulean Warbler ◽  
Mixed Species Flocks ◽  
Cerulean Warblers

Abstract We examined the use of Venezuelan shade-coffee plantations by the Cerulean Warbler (Dendroica cerulea) and other Neotropical migrants. Cerulean Warblers were commonly observed as pairs in mixed-species flocks. Average (± SE) flock size was 13 ± 2 species with 22 ± 3 individuals. Average flock territory size was 2.5 ± 0.2 ha. No differences were detected in foraging behavior (maneuvers, location, or success) among adult males, adult females, and immature birds. Adult males were often observed visiting flowers of canopy trees. The results of this study indicate that shade coffee plantations may provide suitable wintering habitat for Cerulean Warblers although comparisons with other habitats are needed.

scholarly journals Birds, Lower Sangay National Park, Morona-Santiago, Ecuador

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 319
Author(s):  
Esteban Guevara ◽  
Tatiana Santander ◽  
Juan E. Guevara ◽  
Renán Gualotuña ◽  
Vinicio Ortiz
Keyword(s):  
Threatened Species ◽  
National Park ◽  
Bird Species ◽  
Specific Site ◽  
Lower Zone ◽  
Dendroica Cerulea ◽  
Cerulean Warbler

Sangay National Park is located at the mid-eastern Andean foothills of the Cordillera Oriental of Ecuador. We present a preliminary avifauna inventory corresponding to the lower zone of the Sangay National Park (SNP). One-hundred and twenty-seven bird species belonging to 39 families were recorded, including noteworthy records that represent range extensions for four species, Phaetornis hispidus (Gould 1846) (White-bearded Hermit), Ramphastos ambiguus Swainson 1823 (Black-mandibled Toucan), Phylloscartes orbitalis (Cabanis 1873) (Spectacled Bristle Tyrant), and Microcerculus bambla (Boddaert 1783) (Wing-banded Wren). We also obtained information on threatened species such as Aburria aburri (Lesson 1828) (Wattled Guan), Phlogophilus hemileucurus Gould 1860 (Ecuadorian Piedtail), and Dendroica cerulea (Wilson 1810) (Cerulean Warbler) and reproductive data on one species, Patagioenas speciosa (Gmelin 1789) (Scaled Pigeon). To our knowledge this is a first ornithological survey carried out at this specific site of the SNP.

scholarly journals Predicting the Effects of Cerulean Warbler, Dendroica cerulea Management on Eastern Ontario Bird Species

2004 ◽  
Vol 118 (2) ◽  
pp. 229 ◽  
Author(s):  
Jason Jones ◽  
William J. McLeish ◽  
Raleigh J. Robertson
Keyword(s):  
Habitat Management ◽  
Deciduous Forest ◽  
Management Strategies ◽  
Bird Species ◽  
Single Species ◽  
Biodiversity Indicator ◽  
Umbrella Species ◽  
Dendroica Cerulea ◽  
Cerulean Warbler ◽  
Eastern Ontario

Single-species habitat management strategies are often undertaken without explicit consideration of their effects on the larger community. Here we explore the potential effects of managing eastern Ontario deciduous forests for the Cerulean Warbler (Dendroica cerulea) by examining its potential as a biodiversity indicator species and as an umbrella species. Our results indicate that the Cerulean Warbler would not be an effective biodiversity indicator, as its distribution across the studied landscape did not coincide with areas of high avian species richness. However, the Cerulean Warbler may be effective as an umbrella species for the maintenance of populations of other canopy-nesting species that require mature deciduous forest habitats. It is hoped that the conclusions reached in Ontario, while perhaps not directly transferable to all parts of the breeding range, encourage other Cerulean Warbler researchers to ask similar questions in their study areas.

How We Can Learn More about the Cerulean Warbler (Dendroica cerulea)

The Auk ◽  
2004 ◽  
Vol 121 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Paul B. Hamel ◽  
Deanna K. Dawson ◽  
Patrick D. Keyser
Keyword(s):  
Dendroica Cerulea ◽  
Cerulean Warbler

Geographic variation in prevalence and parasitemia of Haemoproteus paruli in the cerulean warbler (Dendroica cerulea)

2005 ◽  
Vol 83 (4) ◽  
pp. 626-629 ◽  
Author(s):  
Christine E Gibb ◽  
Jason Jones ◽  
M Kate Girvan ◽  
Jennifer J Barg ◽  
Raleigh J Robertson
Keyword(s):  
Geographic Variation ◽  
Body Condition ◽  
Significant Relationship ◽  
Regional Differences ◽  
Age Classes ◽  
Dendroica Cerulea ◽  
Cerulean Warbler ◽  
Host Parasite Interactions ◽  
Cerulean Warblers ◽  
Host Parasite

Although host–parasite interactions can affect the ecology and distribution of species, virtually nothing is known about range-wide variation in haematozoan levels in North American birds. We investigated haematozoan prevalence and parasitemia in 112 adult male cerulean warblers (Dendroica cerulea (Wilson, 1810)) in six populations throughout this species' breeding range. Thirty-six birds were infected with Haemoproteus paruli at low parasitemia (mean ± 1 SE, 6.18 ± 1.27 parasites/2000 erythrocytes). Prevalence did not differ between age classes, and there was no significant relationship between parasitism and body condition. However, prevalence and parasitemia were significantly higher in southern populations and further study is required to elucidate factors underlying regional differences in cerulean warbler haematozoan levels.

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