Argentine ornithology. A descriptive catalogue of the birds of the Argentine Republic

Hudson, William Henry; Sclater, Philip Lutley

doi:10.5962/bhl.title.20448

Cited by 16 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous observations of the White-rumped Swallow's nesting behaviour reported them to be highly aggressive solitary nesters (Sclater & Hudson 1889), but even though chases and 'hole perching' behaviour to defend the nestbox entrance from intruders were frequently observed, pairs usually bred within 30 m of each other at Chascomús. Previous observations of the White-rumped Swallow's nesting behaviour reported them to be highly aggressive solitary nesters (Sclater & Hudson 1889), but even though chases and 'hole perching' behaviour to defend the nestbox entrance from intruders were frequently observed, pairs usually bred within 30 m of each other at Chascomús.…”

Section: Discussionmentioning

confidence: 96%

“…Some individuals, however, remained all winter in Buenos Aires Province (Sclater & Hudson 1889;Pereyra 1969), and used nestboxes to roost together (V.M. The number of available boxes was augmented from 53 in 2002/03 to 66 in 2003/04, and 96 in 2004/05; percentage occupation by White-rumped Swallows during those years was 38, 50 and 78%, respectively.…”

Section: Nestbox Occupation and Length Of The Breeding Seasonmentioning

confidence: 99%

“…This is a temperate species whose distribution ranges from southern Brazil, Paraguay, Uruguay and northern Argentina (south to La Pampa and Buenos Aires) (Ridgely & Tudor 1989). In Buenos Aires Province, Sclater and Hudson (1889) described its clutch size as ranging from five to seven eggs, Pereyra (1969) found up to five eggs in their nests (number of nests recorded unknown), and Mason (1985) characterized ten nests, four during the egg stage, with a clutch size of 4-6 eggs and a mean value of 4.75. Finally, De la Peña (1996) found 16 nests of the species, five in the egg stage, with a mean clutch size of 4.4 eggs at Santa Fe Province, Argentina.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Breeding biology of the White‐rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

Massoni¹,

Bulit

Reboreda

2006

Ibis

View full text Add to dashboard Cite

We conducted a study of the breeding biology of the White‐rumped Swallow Tachycineta leucorrhoa nesting in nestboxes in a flat, farming landscape in Buenos Aires Province, Argentina. White‐rumped Swallow nesting attempts were detected from the end of September to mid December, with most clutches laid during October. Birds laid clutches of 4–6 eggs with a mode of five eggs; most broods hatched synchronously (58%), but hatching spread could last up to 4 days. Nestling growth curves adjust well to logistic functions, and at day 15 nestlings attain the asymptotic weight of 21.6 g. Clutch size in White‐rumped Swallows declined significantly as the season progressed. In addition, late‐season eggs were smaller and late‐season nestlings had a shorter nestling period and lower weight at day 15, probably leaving the nest lighter than early‐season nestlings. These data suggest that the Swallows would benefit greatly from laying early in the season, which would provide nestlings with better survival prospects. However, both major sources of nest mortality, interspecific competition for nest‐sites and nestling mortality during bad weather, decreased through the season. White‐rumped Swallows follow the pattern found for other southern species, as it has smaller clutch size, lower growth rate and remains longer at the nest than its Northern Hemisphere congener the Tree Swallow Tachycineta bicolor.

show abstract

Section: Discussionmentioning

confidence: 96%

Section: Nestbox Occupation and Length Of The Breeding Seasonmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Breeding biology of the White‐rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

Massoni¹,

Bulit

Reboreda

2006

Ibis

View full text Add to dashboard Cite

show abstract

“…The use of agricultural and pasture land, as seen today in Entre Rios, was reported in the nineteenth century for populations around Buenos Aires city (Sclater and Hudson 1888). Foraging habits and techniques of Saffron-cowled Blackbirds are similar to those used by Brown-and-Yellow Marshbirds (pers.…”

Section: Natural Historymentioning

confidence: 93%

Natural history and conservation of the endangered Saffron-cowled BlackbirdXanthopsar flavusin Argentina

Fraga¹,

Casañas²,

Pugnali³

1998

Bird Conservation International

View full text Add to dashboard Cite

SummaryBased on 21,518 km of road surveys, the Argentinian range of the endangered Saffron-cowled Blackbird Xanthopsar flavus now seems confined to two small and disjunct areas in Corrientes and Entre Rios provinces, north-east Argentina. In Corrientes the species inhabits natural pastures and rice-fields; in Entre Rios agropastoral land. Estimates based on numbers of localities and flock sizes suggest a Saffron-cowled Blackbird population of 500-1,000 individuals. This blackbird is highly gregarious. Mean flock size (n = 30, non-breeding period) was 31.9 birds (range: 6-102), and was significantly larger in Entre Rios. In Corrientes foraging blackbird flocks associated mostly with the Black-and-White Monjita Xolmis dominicana, in Entre Rios with the Brown-and-Yellow Marshbird Pseudoleistes virescens. Nesting in both provinces was colonial, with up to 24 nests in a 0.43 ha plot. Nests were built in native and introduced herbaceous plants. The Shiny Cowbird Molothrus bonariensis parasitized 29.2% of the nests in one colony; its eggs and chicks are larger than those of the host. Plausible reasons for the species's extinction or decline at a local level are drainage of wetlands (south-west Buenos Aires Province) and the replacement of pastures with pine and eucalypt plantations in Corrientes. General threats include trapping for the pet trade and increased cowbird parasitism. Flocks below a minimum size may not be viable. An urgent measure of protection would be the fencing and preservation of traditional colony sites.En base a 21.518 km de censos de rutas parece que la distribution actual del amenazado Tordo Amarillo o Dragon Xanthopsar flavus en Argentina esta limitada a dos pequenas areas disyuntas en las provincias de Corrientes y Entre Rios. En Corrientes la especie se encuentra en pasturas naturales y arroceras, mientras que en Entre Rios usa campos agrfcola-ganaderos. Una estimation basada en el numero de localidades y tamanos de bandadas indicaria una poblacion total de 500 a 1.000 individuos. El tamano promedio de bando (n = 30, periodo no reproductive) fue 31,9 individuos (rango 6-102) y es significativamente mayor en Entre Rios. En Corrientes las bandadas se asocian principalmente con la Monjita Dominica Xolmis dominicana, y en Entre Rios con el Pecho Amarillo Pseudoleistes virescens. La nidificacion fue colonial en ambas provincias, con una densidad de hasta 24 nidos en 0,43 ha. Los nidos se construyeron en plantas herbaceas nativas y exoticas. El Tordo Renegrido Molothrus bonariensis parasito 29,4 % de los nidos de una colonia, siendo sus huevos y polios significativamente mayores. Posibles razones para la extincion y declination a nivel local de la especie serian el drenaje de humedales (SO de Buenos Aires) y el reemplazo de pasturas por bosques implantados de pinos y eucaliptos (Corrientes). Las amenazas a nivel generates incluyen la captura para el Rosendo M. Fraga, Herndn Casanas and German Pugnali 256 comercio de aves de jaula, y un mayor parasitismo de cr-ia. Una medida urgente de protection de l...

show abstract

“…The results of experiments in which the amount of intestinal extracts of segments 1 and 5 were varied are shown in Fig. It is of interest that the activity of segment 5 was somewhat more heat labile than that of segment 1. Latner et d ( 6 ) have suggested that Vit. A linear relationship between activity and concentration was observed with as much as 0.5 ml of intestinal extract.…”

mentioning

confidence: 99%

Release of Vitamin B12 and Cobamide Coenzyme from Rat Intrinsic Factor by Rat Intestinal Extracts.

Ellenbogen¹,

Highley²

1963

Experimental Biology and Medicine

View full text Add to dashboard Cite

Argentine ornithology. A descriptive catalogue of the birds of the Argentine Republic

Cited by 16 publications

References 0 publications

Breeding biology of the White‐rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

Breeding biology of the White‐rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

Natural history and conservation of the endangered Saffron-cowled BlackbirdXanthopsar flavusin Argentina

Release of Vitamin B12 and Cobamide Coenzyme from Rat Intrinsic Factor by Rat Intestinal Extracts.

Contact Info

Product

Resources

About