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Minute Hermit Phaethornis idaliae Scientific name definitions

Christoph Hinkelmann, Guy M. Kirwan, and Peter F. D. Boesman
Version: 1.0 — Published March 4, 2020
Text last updated February 9, 2013

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Introduction

The Minute Hermit is a resident of Brazil from Bahia south to Rio de Janeiro. True to its name, the Minute Hermit is a very small member of the hummingbird subfamily Phaethornithinae. These sexually dimorphic hummingbirds have dark green iridescent upperparts, with males displaying a dark brown throat and patchy iridescent feathers on the breast and females displaying an orange-ochraceous throat and breast. The Minute Hermit can be found in the understory of primary or secondary growth forest islands within coastal cerrado. This restricted range hummingbird is confined to extremely vulnerable rainforest habitat in the Atlantic forest lowlands, and any further destruction of forest poses a severe threat to this species future.

Field Identification

8·4–9·2 cm (1); 1·8–2·7 g (1). Very small, sexually dimorphic hermit with pointed central rectrices and dark green iridescent upperparts. Male has dark brown throat , with some patchy iridescent feathers on breast. Female has orange-ochraceous throat and breast  , and broader tail feather margins than male, but has on average longer wing and tail (mean values, 37 mm and 34 mm, respectively, versus 35 mm and 23 mm in male) (1); underparts ­remarkably similar in coloration to female P. longuemareus, but that species larger. Juvenile female  like adult female; juvenile male has breast darker than adult female, but paler than adult male; tail feather margins as broad as in female.

Systematics History

One of the small hermits sometimes separated in genus Pygmornis. Often lumped with P. longuemareus but sexual dimorphism and other morphological characters indicate they should be treated as two species. Monotypic.

Subspecies

Monotypic.

Distribution

SE Brazil (SE Bahia S to Rio de Janeiro).

Habitat

Understorey of primary or only slightly disturbed littoral forest, forest edge, old secondary growth, forest islands within the coastal cerrado (restinga). Has been recorded in mature Eucalyptus plantations adjacent to primary forest (2). Occurs below 500 m.

Movement

No information available. Presumably sedentary.

Diet and Foraging

Nectar  and small arthropods, including Araneae, with vegetable matter also recorded in stomach contents (3). Feeds by trap-lining.

Sounds and Vocal Behavior

Song a high-pitched phrase c. 3 seconds long, repeated incessantly. It typically consists of a high-pitched note repeated 3–4 times, followed by an accelerated descending warble. Males sing from low perches at a lek where several birds gather.

Breeding

Oct–Feb. Nest similar to P. longuemareus; two eggs  , size 8 mm × 13 mm, mass 0·32 g (1); incubation  by female, at least 14 days; fledging 20 days, sometimes more.

Not globally threatened. CITES II. Restricted-range species: present in Atlantic Forest Lowlands EBA. Confined to a vulnerable rainforest habitat, further destruction of which may pose a severe threat to the survival of the species; should perhaps be classed as Data Deficient or Near Threatened. Recently recorded as far S as Parati, close to the border of Rio de Janeiro state with that of São Paulo (4). Occurs in Rio Doce State Park (Minas Gerais), União Biological Reserve and Desengano State Park (Rio de Janeiro) (5), and Reserva Natural Linhares and Sooretama Biological Reserve (Espírito Santo). Rare in scientific collections.

Distribution of the Minute Hermit - Range Map
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  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Minute Hermit

Recommended Citation

Hinkelmann, C., G. M. Kirwan, and P. F. D. Boesman (2020). Minute Hermit (Phaethornis idaliae), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.minher1.01
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