Hermit Thrush (Catharus guttatus) Science Article 4 abstract The Hermit Thrush (Catharus guttatus) is a widespread breeder innorthern forests in Canada and the United States. In the eastern U.S. thisspecies is found breeding from northeastern Minnesota east through NewEngland and New York and south to extreme northeastern New Jersey andnorthern Pennsylvania, with isolated populations in […]
Category: Passeriformes
Pair composition and reproductive success across a hybrid zone of carrion crows and hooded crows
Hooded Crow (Corvus corone cornix) Science Article 1 abstract The Carrion Crow (Corvus corone corone) and the Hooded Crow (C. corone cornix) have parapatric ranges in Europe with narrow areas of hybridization. Reproductive biology of populations of Carrion and Hooded crows and hybrids is described for four areas in northern Italy. Nonrandom mating was observed […]
Habitat selection of Hooded and Carrion Crows in the alpine hybrid zone
Hooded Crow (Corvus corone cornix) Science Article 3 abstract Habitat selection of co-existing Hooded Crows Corvus corone cornix and Carrion Crows C. c. corone was studied in the Susa valley, an alpine valley in the Iitalian hybrid zone. Foraging habitat use by the two races was not significantly different during the autumn-winter whereas it was […]
Breeding biology of the Hooded Crow Corvus corone cornix in Warta river valley (W Poland)
Hooded Crow (Corvus corone cornix) Science Article 2 abstract The study area (16 km2) in ‘Ujscie Warty’ National Park, W Poland-was the valley of a lowland river at its confluence with the River Odra, covered by a mosaic of grassy vegetation and willow scrub. 111 breeding attempts were recorded during 2000-2002. The mean nest density […]
Female Hooded Warbler plumage does not become more male-like with age
Hooded Warbler (Wilsonia citrina) Science Article 7 abstract Dwight (1900:284-285) provided two hypotheses to explain the variable amount of black plumage in female Hooded Warblers (Wilsonia citrina): ‘The adult winter plumage . . . shows a variable amount of black about the head and throat. EUGENES . MORTON, Wilson Bull., 101(3), 1989, pp. 460-462 Download […]
DESCRIPTION OF A NEW SUBSPECIES OF PIRANGA HEPATICA SWAINSON.
Hepatic Tanager (Piranga flava) Science Article 1 abstract The geographic range of Piranga hepatica hepatica, as now understood, extends from Arizona to southern Mexico. Examination of a series of 115 specimens of this species in the United States National Museum, including the Biological Survey collection, reveals the existence of an additional and undescribed subspecies from […]
DIET AND PREPARATION FOR SPRING MIGRATION INCAPTIVE HERMIT THRUSHES (CATHARUS GUTTATUS)
Hermit Thrush (Catharus guttatus) Science Article 6 abstract Seasonal changes in food choice by migratory birds often reflect changes in relative food abundance and increased energetic demand. Hermit Thrushes (Catharus guttatus) in southeastern Louisiana are highly frugivorous during winter but forage exclusively onarthropods just prior to spring migration. JENNIFER A. LONG AND PHILIP C. STOUFFER, […]
FRUIT ABUNDANCE AND LOCAL DISTRIBUTION OF WINTERING HERMIT THRUSHES (CATHARUS GUTTATUS)AND YELLOW-RUMPED WARBLERS (DENDROICA CORONATA) IN SOUTH CAROLINA
Hermit Thrush (Catharus guttatus) Science Article 1 abstract We conducted winter censuses of two short-distance migrants, Hermit Thrushes(Catharus gu atus) and Yellow-rumped Warblers (Dendroica coronata), over seven years in fi ve diff erent habitats to determine whether their local abundances could be predicted by fruit pulp biomass. Sampled habitats were stands of upland and bottomland […]
Experimental fruit removal does not affect territory structure of wintering Hermit Thrushes
Hermit Thrush (Catharus guttatus) Science Article 3 abstract Food is generally considered to be the primary resource structuring winter territories in migrant songbirds, but there is little experimental evidence to support this. In southeastern Louisiana, ripe fruits, consumed opportunistically in the absence of preferred arthropod resources, are a primary food resource for wintering Hermit Thrushes […]
A HERMIT THRUSH SONG
Hermit Thrush (Catharus guttatus) Science Article 5 abstract During the summer of 1902 I stayed from the twenty-fourth of June to the thirtieth of July at a camp on the shore of Lake Memphremagog. My tent was placed at the edge of a cedar andhemlock grove, mixed with occasional maples and birches which furnished nesting […]