Sicks Swift (Chaetura meridionalis) Science Article 1 abstract On the middle Rio das Mortes (15 o S., 52 o 15′ W. Greenwich), Mato Grosso, Brazil, I frequently observed a swift that inhabited principally the extensive groves of ‘buritf’ palms. On October 15, 1946, I located two nests of the species. One was torn from its […]
Category: Apodiformes
Systematics and geographic variation in Long-tailed Hermit hummingbirds, the Phaethornis superciliosus-malaris-longirostris species group (trochilidae), with notes on their biogeography.
Long-tailed Hermit (Phaethornis superciliosus) Science Article 1 abstract The degree of relationship between the Variable (Sporophila aurita) and Wing-barred (S. americana) Seedeaters has been debated for over 80 years. The discovery of a zone of hybridization between the former and the Gray Seedeater (S. intermedia), not previously considered to be closely related because of its […]
Evolution of Leks
Long-tailed Hermit (Phaethornis superciliosus) Science Article 2 abstract The most likely reason for males banding in groups known as ‘leks’) for courtship behavior is because it providesan opportunity for females to assess a wide range of males for selection of the best possible traits-and isadvantageous for males because leks increase their chance for encountering females. […]
Notes on the nesting of the Cayenne Swift in Surinam.-
Lesser Swallow-tailed Swift (Panyptila cayennensis) Science Article 2 abstract nest of the Cayenne Swift (Punyptila cayennensis) is one of the most remarkable structures built by any bird in tropical South America. Although the nest has been known for some time, I am not aware of the existence of satisfactory photographs showing a nest in situ. […]
Notes on the nesting of the Cayenne Swift in Surinam.-
Lesser Swallow-tailed Swift (Panyptila cayennensis) Science Article 2 abstract nest of the Cayenne Swift (Punyptila cayennensis) is one of the most remarkable structures built by any bird in tropical South America. Although the nest has been known for some time, I am not aware of the existence of satisfactory photographs showing a nest in situ. […]
Nesting of the Lesser Swallow-tailed Swift, Panyptila cayennensis, in Guatemala.
Lesser Swallow-tailed Swift (Panyptila cayennensis) Science Article 1 abstract Although the Lesser Swallow-tailed Swift has been taken in most of the Central American republics, the small population which has been reported in the lowlands of southeastern Mexico (southern Veracruz) was thought to be separated from the more southern populations by a great expanse of territory […]
Nesting of the Lesser Swallow-tailed Swift, Panyptila cayennensis, in Guatemala.
Lesser Swallow-tailed Swift (Panyptila cayennensis) Science Article 1 abstract Although the Lesser Swallow-tailed Swift has been taken in most of the Central American republics, the small population which has been reported in the lowlands of southeastern Mexico (southern Veracruz) was thought to be separated from the more southern populations by a great expanse of territory […]
The nest and eggs of Smorogdites t. theresiae
Green-tailed Goldenthroat (Polytmus theresiae) Science Article 1 abstract Goldenthroat, SwwczRdiles 1. IlIeresiae, is a rather small hummingbird with rounded tail. It is bright green all over except for the primaries and primary coverts, which are dark brownish gray, glossed with purplish blue, and the belly feathers and under tail coverts, which are partly white. The […]
Systematics and geographic variation in Long-tailed Hermit hummingbirds, the Phaethornis superciliosus-malaris-longirostris species group (trochilidae), with notes on their biogeography.
Great-billed Hermit (Phaethornis malaris) Science Article 1 abstract The degree of relationship between the Variable (Sporophila aurita) and Wing-barred (S. americana) Seedeaters has been debated for over 80 years. The discovery of a zone of hybridization between the former and the Gray Seedeater (S. intermedia), not previously considered to be closely related because of its […]
NOTES ON THE LIFE HISTORY OF AMAZZLZA FZMBRZATAIN SURINAM
Glittering-throated Emerald (Polyerata fimbriata) Science Article 1 abstract L ESSON’S Emerald is a medium-sized hummingbird with a rounded tail Above it is bronze-green, darker on the head and tail, brighter and more glittering on the under surface. The bill is almost straight. Three males that I collected in Surinam weighed 4.5, 4.8, and 5.8 grams; […]