Since 1996 to 2003, we realized an inventory and obtained data on the natural history, trophic guilds and mi- gration patterns of the avifauna of La Paz (Bolivia), based on direct observation, random walks and captures with mist nets. A total of 136 species of birds in 30 localities of study were registered. Tyrannids, Emberizids and Furnariids were the families most representatives with 19, 16 and 15 species, respectively. Eighteen species of waterbirds and two species of passerine rush (called totorales) specialists as Tachuris rubigastra and Phleocryptes melanops, were registered. Two furnariids species (Cranioleuca henricae and Upucerthia harterti) were Bolivian endemics. We detected 57 species in some category of migrants. Unusual elevational movements were observed for five species (e.g. Pitangus sulphuratus, Pyrocephalus rubinus). Nineteen spe- cies were considered rare (e.g. Lesb...

Desde el año 1996 al 2003, mediante métodos de observación directa, caminatas y capturas con redes niebla, realizamos un inventario y obtuvimos datos sobre la historia natural, gremios tróficos y patrones de migración de la avifauna de la ciudad de La Paz (Bolivia). Registramos 136 especies de aves en 30 localidades de estudio. Las familias más representativas fueron Tyrannidae, Emberizidae y Furnariidae con 19, 16 y 15 especies, re- spectivamente. Registramos 18 especies de aves acuáticas y dos especies (Tachuris rubrigastra y Phleocryptes melanops) de passeriformes especialistas de totorales. Dos especies de furnáridos (Cranioleuca henricae y Upucerthia harterti) fueron endémicas bolivianas. Detectamos 57 especies en alguna categoría de migración. Movimientos altitudinales inusuales fueron observados para cinco especies (e.g. Pitangus sulphuratus, Pyro- cephalus rubinus). Di...