Rusty-margined Flycatcher (Myiozetetes cayanensis) Science Article 2 abstract IN Surinam the Rusty-margined Flycatcher (Myiozetetes cayane.ensis) is one of the commonest birds. For a general description, its habitat and breeding habits the reader is referred to my ‘Birds of Surinam’ (Haver- Schmidt, 1968). Two life-histories have been published, a short one by Skutch (1960) from Barro […]
Category: Passeriformes
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 […]
OBSERVATIONS OF SOME UNUSUAL RAINFORESTAND MARSH BIRDS IN SOUTHEASTERN PERU
Rufous-tailed Xenops (Xenops milleri) Science Article 1 abstract This paper provides information on the behavior, distribution, and taxonomy of 36 species of rainforest and marsh birds found in the tropical lowlands of southeastern Peru. Most species discussed are little-known forest residents, but some are widespread and common in other regions, occurring in Peru only as […]
PARENTAL CARE AND NESTING IN THE RUFOUS-THROATED ANTBIRD, GYMNOPZTHYS RUFIGULA, IN AMAPA, BRAZIL
Rufous-throated Antbird (Gymnopithys rufigula) Science Article 1 abstract On 26 April 1968, while studying ant-following birds at Serra do Navio (0′ 55′ N, 52′ 01′ W), Amapa, Brazil, I found a nest of a Rufous-throated Antbird (Gymnopithys rufigula) with two nestlings about 2 or 3 days old. YOSHIKA ONIKI, Wilson Bull. Vol. 83, No. 4 […]
DIFFERENCES IN SINGING BEHAVIOR BETWEEN RUFOUS-COLLARED SPARROWS IN COSTA RICA AND NORTHWESTERN ARGENTINA
Rufous-collared Sparrow (Zonotrichia capensis) Science Article 2 abstract The Rufous-collaredS parrow (Zonotrichia capensisis) one of the most common passerine species in Latin America, ranging from southern Mexico to Tierra de1 Fuego. Although there are studies on the vocal behavior of this species from several locations across SouthAmerica (see King 1974, Nottebohm 1975, Tubaro et al. […]
THE RUFOUS-COLLARED SPARROW AS A HOST OF THE SHINY COWBIRD
Rufous-collared Sparrow (Zonotrichia capensis) Science Article 1 abstract The Rufous-collared Sparrow or Chingolo (Zonotrichia cupensis) is one of the main hosts of the Shiny Cowbird (Molothrus bonariensis) through most of their overlapping range in South America. The most recent study on the interaction between these species was carried out by King (1973) in Horco Molle, […]
The Rufous-Rumped Antwren (Terenura callinota) in Costa Rica
Rufous-rumped Antwren (Terenura callinota) Science Article 1 abstract Rufous-rumped Antwren (Terenura callinota) has a wide distribution from southern Middle America to Guyana and Peru, but is known chiefly from a handful of specimens from widely scattered localities. GARY STILES, Wilson Bulletin: Vol. 95, No. 3 Download article download full text (pdf)
NESTING OF THE RUFOUS-TAILED FLATBILL(TYRANNIDae), IN FRENCH GUIANA
Rufous-tailed Flatbill (Ramphotrigon ruficauda) Science Article 1 abstract In French Guiana, the nesting of the Rufous-tailed Flatbill (Raraphotrigon ruficauda) occurs during the main dry season from mid-July to the end of October. This rain forest inhabitant nests exclusively at the bottom of cavities in the end of broken trunks orlarge fallen branches near the ground. […]
Functional significance of nest size variation in the Rufous Bush Robin Cercotrichas galactotes.
Rufous-tailed Scrub Robin (Erythropygia galactotes) Science Article 1 abstract Avian nest building behaviour has generally been viewed as a result of natural selection, and several functional hypotheses have been suggested to explain variance in nest size. These include responses to predation and parasitism risk, and aspects of nest stability, clutch size, insulation and sexual display. […]
Malformed Bill of Rose-breasted Grosbeak
Rose-breasted Grosbeak (Pheucticus ludovicianus) Science Article 1 abstract On September 4, 1904, a boy brought to me an adult female Rose-breasted Grosbeak (Zamelodialudoviciana), the bill of which presented a curious realformation. Careful examination shows that the condition was not caused by injury, as there is no trace whatever of a fracture, and the upper mandible […]