Red-legged Partridge (Alectoris rufa) Science Article 3 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
Ecological relationships between feather mites (Acari) and wild birds ofEmberizidae (Aves) in a fragment of Atlantic Forest in northeastern Brazil
Red-legged Honeycreeper (Cyanerpes cyaneus) Science Article 1 abstract The objective of this study was to investigate feather mites on birds of the Family Emberizidae, tocollect data on the ecological ectoparasite-host relationship and infestation level. A sum of 94 birds of 9 specieswas captured at the Refugio Ecologico Charles Darwin, Igarassu, Pernambuco, Brazil, from August 1996 […]
Wetland Salinity and Salt Gland Size in the Redhead Aythya americana
Redhead (Aythya americana) Science Article 4 abstract Numerous investigators have shown experimentally that nasal or supraorbital salt glands exist in nonmarine waterfowl and have the ability to enlarge or atrophyi n responset o changesin the salt content of the drinking water (Scothome 1959, Ellis et al. 1963, Cooch 1964, Benson and Phillips 1964, Schmidt-Nielsen and […]
Survey for Blood Parasites in Redheads (Aythya americana) Wintering at the Chandeleur Islands, Louisiana
Redhead (Aythya americana) Science Article 1 abstract We detected no infections with species of Plasmodium, Haemoproteus, Leucocytozoon,Sarcocystis or Trypanosoma in blood smears, liver and spleen impressions, and muscle tissue from 136 redheads (Aythya americana) collected or captured at the ChandeleurIslands, Louisiana (USA), during three winters (1987 to 1990). Thomas C. Michot, Journal of Wildlife Diseases, […]
SALT GLAND DEVELOPMENT IN MIGRATORY REDHEADS(AYTHYA AMERICANA) IN SALINE ENVIRONMENTS ON THEWINTER RANGE, GULF OF MEXICO, USA
Redhead (Aythya americana) Science Article 3 abstract Redheads (Aythya americana) migrate annually from their breeding range in the interior ofNorth America to winter along the coasts of the United States and Mexico. Two of the mostimportant areas where redheads traditionally concentrate in winter are the Laguna Madre andnearby bays in southern Texas and the Chandeleur […]
Record of a Redhead, Aythya americana, laying eggs in a Northern Harrier, Circus cyaneus, nest
Redhead (Aythya americana) Science Article 5 abstract Alberta; Anatidae; Aythya americana; Circus; Circus hudsonius; egg; egg description; eggs; laying; nest; nest parasitism; Northern Harrier Fleskes,J. P, Canadian Field-Naturalist 106:263-264. Download article download full text (pdf)
FOOD HABITS OF REDHEADS (AYTHYA AMERICANA) WINTERING IN SEAGRASS BEDS OF COASTAL LOUISIANA AND TEXAS, USA
Redhead (Aythya americana) Science Article 2 abstract Diets of wintering redheads (Aythya americana) have been studied in the past, but none of theprevious studies compared diets of the upper gastrointestinal tract to determine if they differeddue to sex, age, location, year, or time of year. MICHOT, T. C et al, Acta Zoologica Academiae Scientiarum Hungaricae […]
Paternity assurance in two species of colonially breedingfalcon: the kestrel Falco tinnunculus and the red-footedfalcon Falco vespertinus
Red-footed Falcon (Falco vespertinus) Science Article 1 abstract Mate-guarding and frequent within-pair copulations are the two main paternityguards of male birds. Some species of birds of prey depend on large foraging areas due tothe availability and dispersion of their food, and males supply their females with food frommating until early chick rearing. Furthermore, birds of […]
RED-EYED VIREOS HAVE DIFFICULTY RECOGNIZINGINDIVIDUAL NEIGHBORS’ SONGS
Red-eyed Vireo (Vireo olivaceus) Science Article 3 abstract I investigated recognition of individual neighbors’ songs in a migratory species with large repertoires, the Red-eyed Vireo (Vireo olivaceous). To test for abilities to recognize individual neighbors, I measured responses to playbacks of neighbors songs from appropriateand inappropriate boundaries in two different years. Because the responses to […]
NEST SITE SELECTION AND NESTING SUCCESS OF THE REDEYEDVIREO IN CENTRAL PENNSYLVANIA
Red-eyed Vireo (Vireo olivaceus) Science Article 1 abstract We compared nest placement and characteristics of nesting habitat used by Red-eyed Vireos(Vireo olivaceous) in deciduous forests of central Pennsylvania during the breeding seasons of 1998 and 1999.Nest patches versus random patches (0.04-ha circular plots centered on nests or random points, respectively)and successful versus unsuccessful nest patches […]