First documented records of Black-throated Flower-piercer, Diglossa brunneiventris (Lafresnaye, 1846) (Aves, Thraupidae), and Least Tern, Sternula antillarum (Lesson, 1847) (Aves, Laridae), on the southern coast of Peru

Yuri A Peña,R Rodrigo Mena,Alberto Cáceres,Luis Gonzalo Cano

doi:10.15560/17.2.401

Abstract

We report Black-throated Flower-piercer, Diglossa brunneiventris (Lafresnaye, 1846), and Least Tern, Sternula antillarum (Lesson, 1847), in the Tambo river estuary, Islay province, Arequipa department, Peru. Both species are newly documented from the southern coast of Peru. It is probable that D. brunneiventris has descended from the higher, inland portion of the Tambo river basin to the estuary. Sternula antillarum is considered a frequent visitor to the South American Pacific coast.

Highlights

We report Black-throated Flower-piercer, Diglossa brunneiventris (Lafresnaye, 1846), and Least Tern, Sternula antillarum (Lesson, 1847), in the Tambo river estuary, Islay province, Arequipa department, Peru
Both species were recorded during the fieldwork of the project “Aves de la desembocadura del río Tambo” within the Santuario Nacional Lagunas de Mejía, which preserves native riparian vegetation, sandy beaches, and the estuary of Tambo River
The bill is distinct from other species of Thraupidae, and D. brunneiventris is the only species of Diglossa that occurs on the western slopes of the Andes to southern Peru (Schulenberg et al 2010)

Summary

Introduction

Black-throated Flower-piercer, Diglossa brunneiventris (Lafresnaye, 1846), is a small (12–13 cm) passerine (Fjeldså and Krabbe 1990; Schulenberg et al 2010), with two recognized subspecies, D. b. vuilleumieri (Graves, 1980), which is restricted to Antioquia, Colombia, and D. b. brunneiventris (Lafresnaye, 1846), which occurs along both the eastern and western slopes of the Andes from 2400 to 4300 m a.s.l. (Schulenberg et al 2010; Del Hoyo et al 2011). In Peru, D. brunneiventris inhabits northern Cajamarca to eastern Puno and Tacna (Fjeldså and Krabbe 1990) This resident species is found in a wide variety of habitats, such as dry scrub, gorges with Gynoxys bushes, Polylepis forests, agricultural fields, and Eucalyptus plantations (Fjeldså and Krabbe 1990; Del Hoyo et al 2011; Walker 2015). In Peru, this species is a rare boreal migrant (Schulenberg et al 2010), and some individuals are considered vagrant (Plenge 2020) It inhabits lakes, estuaries, rivers, and sandy coasts, where it feeds on fresh and saltwater fish in shallow water. We report the first records of D. brunneiventris and S. antillarum on the southern coast of Peru (Fig. 1)

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