Yellow-headed Blackbird (Xanthocephalus xanthocephalus) Science Article 4 abstract Currently considered a Bird Species of Special Concern (breeding), priority 3. Not included on previous lists (Remsen 1978, CDFG 1992). Studies of Western Birds 1:444-450, 2008, Shuford, W. D., and Gardali, T Download article download full text (pdf)

Yellow Oriole (Icterus nigrogularis) Science Article 1 abstract In his interesting and important paper,

Shiny Cowbird (Molothrus bonariensis) Science Article 3 abstract Hellmayr (Field Mus. Nat. Hist. Publ. 347, Zoo1. Set. vol 13, 1935, p. 319) includes Surinam in the range of Conirostrum bicolor on evidence of the Penard brothers (Vogels van Guyana, 2, 1910, p. 475), though he mentions no specimens nor localities. In Surinam, as elsewhere in […]

Shiny Cowbird (Molothrus bonariensis) Science Article 2 abstract Parasitic cowbirds lay eggs in the nests of other species and dupe them into caring for their young. Unlike other brood parasites,cowbirds have not developed egg mimicry or bizarre chick morphology. However, most of them parasitize a large number ofhosts. Several features of cowbirds have been proposed […]

Shiny Cowbird (Molothrus bonariensis) Science Article 1 abstract I studied the interaction between a brood parasite, the Shiny Cowbird (Molothrusbonariensis), and a large host, the Rufous-bellied Thrush (Turdus rujventris), in the Pampas Region of Argentina. Shiny Cowbird eggs were observed in 34 out of 70 (48.6%) thrush nests throughout the host’s breeding season. The main […]

Shiny Cowbird (Molothrus bonariensis) Science Article 7 abstract Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) and some bird species were registered in the Lami Biological Reserve, southern Brazil, through observations in a set of transects established in the five major vegetation types of the study area: shrubby and herbaceous swamps, wet grasslands, sandy grasslands […]

Shiny Cowbird (Molothrus bonariensis) Science Article 5 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, […]

Shiny Cowbird (Molothrus bonariensis) Science Article 4 abstract I analyzed the origin, distribution, and hosts of the Shiny Cowbird (Molothrus bonairensis) in Chile, using specimen records and the literature. It is more likely that the species was introduced to Chile before natural dispersal could take place from Argentina. The earliest specimens are from mid-1865 and […]

Shiny Cowbird (Molothrus bonariensis) Science Article 6 abstract Recent human settlement in Brasilia, Central Brazil, has greatly reduced the extent of native cerrado vegetation. This has favored the Shiny Cowbird, Molothrus bonariensis,which is common in farmland and certain urban sites. Between September and December of 1982 to 1984, we observed cowbird nestlings(n) or fledglings(f) attended […]

Epaulet Oriole (Icterus cayanensis) Science Article 1 abstract Among the vertebrate pollinated plants, the genus Erythrina includes tree species in which birds arethe pollen vectors. Two groups in this genus may be distinguished: a) the hummingbird, and b) theperching bird pollinated species. Erythrina dominguezii is included in the second group and occursin deciduous/semi-deciduous forests in […]