Category: Thraupidae

Breeding Habits, Nestling Development, andVocalizations in the Summer Tanager

Summer Tanager (Piranga rubra) Science Article 3 abstract A pair of Summer Tanagers (Piranga rubra) nested near Zebulon, WakeCounty, N.C., in the spring of 1983. Nest contents were examined almost daily from 21May, the first day of incubation, through fledging of the young on 12 June. ELOISE F. POTTER, The Chat, 1985 Download article download […]

Time Of Departure by Summer Tanagers (Piranga rubra) from a Stopover Site Following Spring Trans-Gulf Migration

Summer Tanager (Piranga rubra) Science Article 1 abstract Nocturnal passerine migration typically commences within an hour of sunset and the bulk of migrants depart before the end of nautical twilight. FRANK R. MOORE AND DAVID A. ASORN, The Auk 113(4):949-952, 1996 Download article download full text (pdf)

Nesting behavior of the Slate-colored Seedeater (Sporophila schistacea) in Panama

Slate-coloured Seedeater (Sporophila schistacea) Science Article 2 abstract The nesting behavior of the Slate-colored Seedeater (Sporophila schistacea) is virtually unknown, and few nests have been described previously (Wetmore et al. 1984, Hilty & Brown 1986). This species is highly nomadic and tends to breed I in areas with large seed crops, particularly bamboo (Willis & […]

The Slate-colored Seedeater (Sporophila schistacea): a bamboo specialist?

Slate-coloured Seedeater (Sporophila schistacea) Science Article 1 abstract The idea of constant density and stable territoriality found in some tropical birds (Greenberg & Gradwohl1986) does not lend itse1f to species that rely on a short-term, unpredictable resource. One such resource is mast-seeding plants. Mast seeding is the synchronized production of seed at long intervals by […]

PIGMENTATION IN THE SCARLET TANAGER, PIRANGA OLIVACEA

Scarlet Tanager (Piranga olivacea) Science Article 1 abstract Conspicuous coloration of passerines and probably of many other birds is importantin species recognition and sexual behavior (Hamilton, 1961). The signalfunctions of plumages have accompanied the evolution of sexual dimorphism ALAN H. BRUSH, THE CONDOR, 69:549-559, 1967 Download article download full text (pdf)

EFFECT OF BIRD DENSITY ON THE DECISION TO JOIN A GROUP INTHE SICALIS FLAVEOLA PELZENI (PASSERIFORMES, EMBERIZIDae)

Saffron Finch (Sicalis flaveola) Science Article 1 abstract A change in bird density within a captive flock of Sicalis flaveola pelzeni (Sclater, 1872) affected thedecision to join a group. Ruling out inter-individual differences and maintaining constant the size of a foodpatch, birds were found to fly more often to the food source and spend a […]

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 […]