Hooded Warbler (Wilsonia citrina) Science Article 6 abstract We tested whether Hooded Warblers (Wilsonia citrina) experienced a smaller food supply insmall versus large forest fragments in northwestern Pennsylvania. Using 16 fragments that ranged in size from 0.7 to 214 ha, we videotaped parental feeding rates to nestlings in 35 nests and sampled arthropod abundance on […]
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 […]
Courtship of the Hooded Merganser (Lophodytes cucullatus)
Hooded Merganser (Lophodytes cucullatus) Science Article 2 abstract On the afternoon of March 17, 1933, a warm, springlike day which had brought up the March migrants in goodly numbers, as we neared the west bank of the Ox-bow at Northampton, we glimpsed a flash of white close behind the bushes that grew on its verge. […]
A Hooded Merganser from the Late Pleistocene of Oklahoma
Hooded Merganser (Lophodytes cucullatus) Science Article 3 abstract I have had the privilege of studying a number of small collections of more or less fragmentary fossil bird bones taken from various localities by Dr. Claude W. Hibbard and his associates. WILLIAM A. LUNK, The Condor, vol. 54 Download article download full text (pdf)
RECORD OF THE HOODED MERGANSER (LOPHODYTESCUCULLATUS) IN ‘LOS PETENES’, NORTHWESTERNCAMPECHE, MEXICO
Hooded Merganser (Lophodytes cucullatus) Science Article 1 abstract The Hooded Merganser (Lophodytes cucullatus) is an uncommon migratory species (Robbinset al. 1983) that breeds from southeastern Alaska, south through Canada to northeasternand northwestern United States (AOU 1998). Octavio R. Rojas-Soto and Alejandro de Alba Bocanegra, ORNITOLOGIA NEOTROPICAL 13: 85-86, 2002 Download article download full text (pdf)
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 […]
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 […]
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 […]
Woodpigeons nesting in association with hobby falcons:advantages and choice rules
Hobby (Falco subbuteo) Science Article 2 abstract Many bird species nest in close association with other bolder and more aggressive birds which provideprotection against nest predators. The woodpigeons, Columba palumbus, that nest in poplar plantations inNorthern Italy are found almost exclusively clumped around hobby, Falco subbuteo, nests. Woodpigeonssettle in the area and build their nests […]
Eurasian Hobby density, nest area occupancy, diet, and productivity in relation to intensive agriculture
Hobby (Falco subbuteo) Science Article 1 abstract A Eurasian Hobby (Falco subbuteo) population of 13-18 breeding pairs was studied for 6 years from 1987 to 1995 in a 62 km2 study area located within the seasonal flood zones of the PO River plain in northern Italy and characterized by intensive farmland interspersed with poplar (Populus […]