Blackish-grey Antshrike
Encyclopedia
The Blackish-grey Antshrike (Thamnophilus nigrocinereus) is a species of bird in the Thamnophilidae family, the antbird
s.
The species is found in Brazil
, Colombia
, Venezuela
, and eastern French Guiana
; also a small river region of northeast Bolivia
.
Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical swamps. It got its name "Blackish-grey Antshrike" because of its blackish-grey color, distinguishing it from other Antshrikes.
as well as along the Amazon River
proper, and northwards at the Amazon's outlet, into the extreme eastern areas of French Guiana with Brazil's northeast state of Amapá
. The southeast range extends slightly southwestward into that quadrant, about 1000-1400 km, and its eastern limit is the final 950 km of the Tocantins River
drainage. On the west bordering some of the southwest quadrant, the range is limited by the Madeira River
and continues upstream into extreme northeast Bolivia for 75 km in an area around the Madeira and Guapore River
confluence. To the east the range is contiguous and covers the river drainages of the Tapajós
, Xingu River
, and lower Tocantins River, a range of about 3500 km.
The northwest extension of the range expands from the Amazon River northwestwards upstream on the Rio Negro, (as a river corridor
) into eastern and central Colombia, also eastward and north into central and southern Venezuela into the Orinoco River drainage. In the central Orinoco drainage, it does not range away from the river northwards, nor is it found in the lower third of the drainage to the Caribbean.
Antbird
The antbirds are a large family, Thamnophilidae, of passerine birds found across subtropical and tropical Central and South America, from Mexico to Argentina. There are more than 200 species, known variously as antshrikes, antwrens, antvireos, fire-eyes, bare-eyes and bushbirds...
s.
The species is found in Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...
, Colombia
Colombia
Colombia, officially the Republic of Colombia , is a unitary constitutional republic comprising thirty-two departments. The country is located in northwestern South America, bordered to the east by Venezuela and Brazil; to the south by Ecuador and Peru; to the north by the Caribbean Sea; to the...
, Venezuela
Venezuela
Venezuela , officially called the Bolivarian Republic of Venezuela , is a tropical country on the northern coast of South America. It borders Colombia to the west, Guyana to the east, and Brazil to the south...
, and eastern French Guiana
French Guiana
French Guiana is an overseas region of France, consisting of a single overseas department located on the northern Atlantic coast of South America. It has borders with two nations, Brazil to the east and south, and Suriname to the west...
; also a small river region of northeast Bolivia
Bolivia
Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...
.
Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical swamps. It got its name "Blackish-grey Antshrike" because of its blackish-grey color, distinguishing it from other Antshrikes.
Range: Amazon & Orinoco River Basins
The Blackish-grey Antshrike is found in Brazil's southeastern Amazon BasinAmazon Basin
The Amazon Basin is the part of South America drained by the Amazon River and its tributaries that drains an area of about , or roughly 40 percent of South America. The basin is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Venezuela...
as well as along the Amazon River
Amazon River
The Amazon of South America is the second longest river in the world and by far the largest by waterflow with an average discharge greater than the next seven largest rivers combined...
proper, and northwards at the Amazon's outlet, into the extreme eastern areas of French Guiana with Brazil's northeast state of Amapá
Amapá
Amapá is one of the states of Brazil, located in the extreme north, bordering French Guiana and Suriname to the north. To the east is the Atlantic Ocean, and to the south and west is the Brazilian state of Pará. Perhaps one of the main features of the state is the River Oiapoque, as it was once...
. The southeast range extends slightly southwestward into that quadrant, about 1000-1400 km, and its eastern limit is the final 950 km of the Tocantins River
Tocantins River
The Tocantins is a river in Brazil, the central fluvial artery of the country. In the Tupi language, its name means "toucan's beak" . It runs from south to north for about 2,640 km. It is not really a branch of the Amazon River, although usually so considered, since its waters flow into the...
drainage. On the west bordering some of the southwest quadrant, the range is limited by the Madeira River
Madeira River
The Madeira River is a major waterway in South America, approximately 3,250 km miles long The Madeira is the biggest tributary of the Amazon...
and continues upstream into extreme northeast Bolivia for 75 km in an area around the Madeira and Guapore River
Guaporé
Guaporé may refer to:*Guaporé River in Brazil/Bolivia*Guaporé, Rio Grande do Sul in Brazil*The former name of Rondônia...
confluence. To the east the range is contiguous and covers the river drainages of the Tapajós
Tapajós
The Tapajós, a Brazilian river running through a humid and hot valley, pours into the Amazon River 500 miles above Pará and is about 1200 miles long.It rises on the lofty Brazilian plateau near Diamantino in 14 degrees 25' south latitude...
, Xingu River
Xingu River
The Xingu River , also called Rio Xingu, is a 1,230-mile long, river in north Brazil; it is a southeast tributary of the Amazon River.-Description and history:...
, and lower Tocantins River, a range of about 3500 km.
The northwest extension of the range expands from the Amazon River northwestwards upstream on the Rio Negro, (as a river corridor
Wildlife corridor
A wildlife corridor or green corridor is an area of habitat connecting wildlife populations separated by human activities . This allows an exchange of individuals between populations, which may help prevent the negative effects of inbreeding and reduced genetic diversity that often occur within...
) into eastern and central Colombia, also eastward and north into central and southern Venezuela into the Orinoco River drainage. In the central Orinoco drainage, it does not range away from the river northwards, nor is it found in the lower third of the drainage to the Caribbean.