We present new distribution information for 19 species of Costa Rican birds. Thirteen
species show changes in altitudinal distribution, 9 are recorded at higher elevations
such as Egretta rufescens (Gmelin, 1789), Heliomaster constantii (Delattre, 1843),
Myiozetetes cayanensis (Linnaeus, 1766), and Lonchura malacca (Linnaeus, 1766), and
4 are recorded at lower elevations, Panterpe insignis Cabanis & Heine, 1860, Empidonax
albigularis Sclater & Salvin, 1859, Sayornis nigricans (Swainson, 1827), and Dacnis
venusta (Lawrence, 1862). We recorded 2 forest understory species, Geotrygon montana
(Linnaeus, 1758), and Grallaria guatimalensis Prévost & Des Murs, 1842, inside the
area of the county with the most urban development. Finally, Saltator grossus (Linnaeus,
1766), which was restricted to Caribbean forest, was recorded at the South Pacific
rainforest for the first time.