Notes on the biology of some passerines birds from NW Argentina, part 1

Abstract

Notes on the biology of some passerines birds from NW Argentina, part 1?. Nidological observations on some tyrannine, paruline and emberizine birds: Nests and eggs of Stigmatura budytoides, Parula pitiayumi and Sporophila caerulescens are described. Dates about shape and size, as well as the material employed to building are given. Numbers, colours and measures of eggs are reported as well as the dates and places of collection.