Speckled tanager Speckled tanager The speckled tanager ("Tangara guttata") is a medium-sized passerine bird. It is a resident breeder in Costa Rica, Panama, Trinidad, Venezuela, Colombia, Guyana, Suriname and the extreme north of Brazil. There are also sight records from French Guiana. It is probably a close relative of the spotted tanager ("T. punctata") which replaces it to the south. These two species are generally presumably to be fully allopatric, but may actually be parapatric: in 1998 a speckled tanager was found in the Serranía de los Churumbelos (Colombia), just about north of where spotted tanagers are known to occur. Adult speckled
Geology of French Guiana the Paramaca series, which corresponds to a series of micaschists, aluminous paragneisses and black quartzites whose total thickness is about 1 km. The central granite massifs consist of granite plutons, granodiorites and quartz diorites dating from 2.05 to 2.15 billion years ago. The north of French Guiana corresponds to a synclinorium composed of the Paramaca series on which sandstone and fluviatile conglomerates lie unconformably. Shield rocks in Guyana are all dated between 1.6 and 2.5 billion years ago. The Quaternary lands are located in the northern part of Guyana, near the coast, unconformably on the Paleozoic lands. The coastal plains