Hayes, F. E., and T. Granizo Tamayo. 1992. Bird densities along three tributaries of the Paran� River in
eastern Paraguay. Hornero 13:254-256.
Resumen.--Se realizaron censos de aves (y mam�feros) navegando en canoa a lo largo de 198 km de tres r�os afluentes del r�o Paran�: Carap�, Itambey y �acunday, en el Paraguay oriental. Se presentan datos sobre densidades lineales para aves acu�ticas, rapaces, loros y tucanes (y tres especies de mam�feros), en cada r�o estudiado. No se encontr� el amenazado Pato Serrucho (Mergus octosetaceus), un residente anterior de la regi�n, lo que indica que esta especies puede estar ya extinta en el Paraguay.
Abstract [translated from resumen].--We conducted censuses of birds (and mammals) while navigating by canoe along 198 km of three tributaries of the Paran� River: Carap�, Itambey y �acunday, in eastern Paraguay. We provide data on linear densities for aquatic birds, raptors, parrots and toucans (and three mammal species). We failed to find the endangered Brazilian Merganser (Mergus octosetaceus), a former resident of the region, which indicates that it may be exinct already in Paraguay. |
