Grey-and-gold Warbler
Encyclopedia
The Grey-and-gold Warbler (Basileuterus fraseri) is a species of bird
in the Parulidae family.
It is found in Ecuador
and Peru
.
Its natural habitat
s are subtropical or tropical dry forest
s and subtropical or tropical moist lowland forests. Aspects of the Grey-and-gold Warbler's breeding biology were recently described by Miller et al. (2007), based on a sample of two nests.
One nest, in the Jorupe Reserve (owned and operated by the Fundación Jocotoco) of southwest Ecuador
, contained two well-feathered nestlings when discovered by the authors. The adults were observed to feed the nestlings one after the other, in quick succession. The nest, a domed cup with a side entrance, was built into the side of a steep ravine and tucked under a liana such that the slope of the hill and the top of the nest were even. The young, when they fledged from the nest, flew successfully from the rim of the cup and out of view.
The second nest was found by the authors in the Tumbes Reserved Zone, northwest Peru
. When discovered, it contained four creamy white eggs with pinkish-orange and red-brown speckles concentrated at the larger ends. Like the first nest, this second was built into a steep slope and, in this case, embedded in a natural depression at the base of a Chrysophyllum
tree.
After the young fledged, the first nest was collected and carefully dissected into its component parts. The nest was composed of two, distinct linings placed within the body of the nest. The lower portion of the body was tightly woven and readily distinguished from the loosely interwoven dome. Materials used included: dry grass; dark, flexible fibers; pale fibers; and skeletonized leaves.
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
in the Parulidae family.
It is found in Ecuador
Ecuador
Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...
and Peru
Peru
Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....
.
Its natural habitat
Habitat
* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...
s are subtropical or tropical dry forest
Forest
A forest, also referred to as a wood or the woods, is an area with a high density of trees. As with cities, depending where you are in the world, what is considered a forest may vary significantly in size and have various classification according to how and what of the forest is composed...
s and subtropical or tropical moist lowland forests. Aspects of the Grey-and-gold Warbler's breeding biology were recently described by Miller et al. (2007), based on a sample of two nests.
One nest, in the Jorupe Reserve (owned and operated by the Fundación Jocotoco) of southwest Ecuador
Ecuador
Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...
, contained two well-feathered nestlings when discovered by the authors. The adults were observed to feed the nestlings one after the other, in quick succession. The nest, a domed cup with a side entrance, was built into the side of a steep ravine and tucked under a liana such that the slope of the hill and the top of the nest were even. The young, when they fledged from the nest, flew successfully from the rim of the cup and out of view.
The second nest was found by the authors in the Tumbes Reserved Zone, northwest Peru
Peru
Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....
. When discovered, it contained four creamy white eggs with pinkish-orange and red-brown speckles concentrated at the larger ends. Like the first nest, this second was built into a steep slope and, in this case, embedded in a natural depression at the base of a Chrysophyllum
Chrysophyllum
Chrysophyllum is a genus of about 70-80 species of tropical trees, growing rapidly to 10–20 m or more in height. The genus is native to tropical regions throughout the world, with the greatest number of species in northern South America. One species, C...
tree.
After the young fledged, the first nest was collected and carefully dissected into its component parts. The nest was composed of two, distinct linings placed within the body of the nest. The lower portion of the body was tightly woven and readily distinguished from the loosely interwoven dome. Materials used included: dry grass; dark, flexible fibers; pale fibers; and skeletonized leaves.