Rufous-bellied antwren Rufous-bellied antwren The rufous-bellied antwren ("Isleria guttata") is a species of bird in the family Thamnophilidae. It is found in Brazil, French Guiana, Guyana, Suriname, and Venezuela. The bird's range is in the entire north of the Amazon Basin, from Venezuela in the west to the Brazilian state of Amapá to the east, but is not found south of the Amazon River. Its natural habitat is subtropical or tropical moist lowland forests. The rufous-bellied antwren was described and illustrated by the French ornithologist Louis Vieillot in 1824 and given the binomial name "Myrmothera guttata". The current genus "Isleria" was introduced
British Guiana 1899 arbitration award settling the British Guiana—Venezuela border made reference to the border with Suriname as continuing to the source of the Courantyne River, which it named as the Kutari River. The Netherlands raised a diplomatic protest, claiming that the New River, and not the Kutari, was to be regarded as the source of the Courantyne and the boundary. The British government in 1900 replied that the issue was already settled by the longstanding acceptance of the Kutari as the boundary. In 1962, the Kingdom of the Netherlands, on behalf of Suriname, which had become a constituent country of the