Category: Thraupidae

AN OBSERVATION OF A SUMMER TANAGER ATTEMPTING TO EAT AN ANOLIS LIZARD

Summer Tanager (Piranga rubra) Science Article 2 abstract A Summer Tanager (Piranga rubra) was observed attempting to eat an anole (Anolis carolinensis) at a migratory stopover site. The event may reflect the importance ofbehavioral plasticity during migration, but might also be the result of a simple stimulus response mechanism. DANIEL FROEHLICH, J. Field Ornithol., 66(4):501-502, […]

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 […]

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 NESTING OF SOME VENEZUELAN BIRDS

Silver-beaked Tanager (Ramphocelus carbo) Science Article 1 abstract I passed the interval from 15 March to 24 July 1966 at ‘La Araguata,’ a large cattle farmsituated among the hills near Pirapira, some 20 miles south of Valencia in the state ofCarabobo, Venezuela. Although most of my time was devoted to the study of the RufousfrontedThornbird […]

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 […]

The nest and egg of Tachyphonus phoenicius

Red-shouldered Tanager (Tachyphonus phoenicius) Science Article 1 abstract Red-shouldered Tanager (Tuchyphonus phoenicius) is a medium-sized tanager which inhabits the Guianas, northern Brazil, southern Venezuela, and eastern Peru. F. HAVERSCHMIDT, Wilson Bulletin: Vol.68,No.4 Download article download full text (pdf)

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 […]