Chough (Pyrrhocorax pyrrhocorax) Science Article 5 abstract Using data from a 20-year study of individually marked red-billed choughs, we examine how reproductive performance varies with age in male and female breeders, and investigate whether population-level trends result from changes in individual performance and/or the phenotypic composition of the breeding population. Across the population, mean clutch […]
Breeding density and distribution of Choughs Pyrrhocorax pyrrhocorax nesting in river cliffs: The role of nest-site availability.
Chough (Pyrrhocorax pyrrhocorax) Science Article 2 abstract The breeding abundance of Choughs Pyrrhocorax pyrrhocorax was investigated in relation to type of rock and related features of nesting cliffs along rivers in south-eastern Madrid (Central Spain). Gypsum cliffs are larger and provide more nest sites than clay and limestone cliffs. Cliffs used by breeding Choughs contained […]
Foliage-gleaning by Chimney Swifts (Chaetura pelagica)
Chimney Swift (Chaetura pelagica) Science Article 2 abstract Apparent gleaning of insects from leaves has been reported in Chimney Swifts by Fischer (New York Mus. Sci. Serv. Bull., No. 336: 1, 1958) and in Short-tailed Swifts (C. brachyura) by Collins (Bull. Florida State Mus., 11: 257, 1968). William G. George, Auk, Vol. 88 Download article […]
The Winter Range of the Chimney Swift (Chaetura pelagica)
Chimney Swift (Chaetura pelagica) Science Article 1 abstract In identifying birds for cataloging, I have discovered that we have in the American Museum three Middle American specimens of the Chimney Swift, and as a contribution to our knowledge of the ‘Winter’ range of this species. FRANK M. CHAPMAN, Auk, Vol. 48 Download article download full […]
THIRTEEN-YEAR BREEDING HISTORY OF A CHIMNEY SWIFT
Chimney Swift (Chaetura pelagica) Science Article 3 abstract The breeding history of a male Chimney Swift (Chaetura pelagica) has been traced indetail over a period of 13 years (1947-1959), which is the longest continuous record knownfor any individual of this species. During this time it resided or nested each year on thecampus of Kent State […]
FACTORS ASSOCIATED WITH THE INTERVAL BETWEEN FEEDING VISITS IN BROOD-REARING CHIMNEY SWIFTS
Chimney Swift (Chaetura pelagica) Science Article 4 abstract Chimney Swifts (Chaetura pelagica) forage almost exclusively by hawking insects from the air. During brood-rearing, adult swifts of both sexes periodically bring food to their nestlings. During our studies on Chimney Swift behavior and ecology
The occurrence of Phoenicopterus Chilensis molina (aves, phoenicopteridae) in Sao Paulo state reservoirs
Chilean Flamingo (Phoenicopterus chilensis) Science Article 1 abstract The chilean flamingo, Phoenicopterus chilensis Molina, 1782 is a species restricted to South America, with a meridional distribution, occurring from central Peru southwards, through the Andes to Tierra del Fuego and extending eastwards to South Brazil and Uruguay (Del Hoyo, 1992). It is a winter visitor in […]
Mate Fidelity in Chiffchaff Phylloscopus collybita
Chiffchaff (Phylloscopus collybita) Science Article 1 abstract Two cases of year-to-year mate fidelity in Chiffchaff occurred in the subpopulation of 6 males and their females in a region of South Bohemia. The first nesting of both females failed in the first season. One of them was secondary female in the first season. Both pairs renested […]
The nest and eggs of the Chestnut-vented Conebill Conirostrum speciosum (Temminck, 1824)
Chestnut-vented Conebill (Conirostrum speciosum) Science Article 1 abstract The genus Conirostrum (Lafresnaye & d’Orbigny, 1838) comprises nine species, all endemic to the Neotropical Region, where it is widely distributed (Meyer de Schauensee 1982)- Of the species of this genus, only C. bicolor and C. cinereum have had their nests and eggs described (Herklots 1961; Johnson […]
EXTRAPAIR PATERNITY INCREASES VARIABILITY INMALE REPRODUCTIVE SUCCESS IN THE CHESTNUT-SIDEDWARBLER (DENDROICA PENSYLVANICA), A SOCIALLYMONOGAMOUS SONGBIRD
Chestnut-sided Warbler (Dendroica pensylvanica) Science Article 1 abstract A monogamous mating system that includes extrapair fertilization can potentially generate higher variability in male reproductive success than monogamy without extrapair fertilization. That increased variability could provide a correspondingly higher opportunity for sexual selection and, thus, for the origin and persistence of sexual dimorphism in monogamous species. […]