Darwin's flycatcher is a common name for the brujo flycatcher (Pyrocephalus nanus), a small passerine bird in the family Tyrannidae (the tyrant flycatchers). The species is endemic to the Galápagos Islands of Ecuador and is classified as Near Threatened by the International Union for Conservation of Nature (IUCN)【1†L1-L5】【1†L31-L34】.
Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Aves
- Order: Passeriformes
- Family: Tyrannidae
- Genus: Pyrocephalus
- Species: P. nanus
The bird was first described by the English ornithologist John Gould in 1838, based on specimens collected by Charles Darwin during the HMS Beagle expedition to the Galápagos in 1835【1†L19-L23】. The specific epithet nanus is Latin for “dwarf.” The English name “brujo” (Spanish for “witch” or “sorcerer”) is also used, as is “little vermilion flycatcher”【1†L6-L9】.
Description
Adults measure 13–14 cm (5.1–5.5 in) in length and weigh 11–14 g (0.39–0.49 oz). Males display a bright vermilion or scarlet crown, forehead, and underparts, with blackish‑brown upperparts and a contrasting black mask around the eyes. Females are more subdued, with grayish‑brown plumage, a faint supercilium, and pale red to salmon underparts streaked with gray【1†L30-L38】.
Distribution and Habitat
The species occurs on all major islands of the Galápagos archipelago except San Cristóbal. It inhabits the interior and edges of relatively humid highland forests, often associated with plant genera such as Scalesia, Tournefortia, and Zanthoxylum【1†L41-L44】.
Behavior
- Movement: The bird is a year‑round resident throughout its range.
- Feeding: It forages by perching openly and sallying to capture flying and terrestrial insects, as well as other arthropods. Detailed diet composition is not well documented.
- Breeding: Breeding takes place from December to May, the rainy season. Nests are cup‑shaped structures made of moss and lichens, placed in trees or shrubs, typically containing three eggs. Further aspects of its breeding biology remain poorly known【1†L46-L52】.
Vocalizations
Darwin's flycatcher produces a distinctive song during an undulating circular flight display, described as a “loudly whispering chew‑wit” followed by a “sharp mechanical snap.” Perched individuals emit similar “chew‑wit” notes and a sharp “pew” call【1†L54-L57】.
Conservation Status
The IUCN assesses the brujo flycatcher as Near Threatened, with an estimated 52 000 mature individuals (range 36 000–72 000). Threats include competition from introduced bird species (e.g., smooth‑billed ani) and parasitism by the introduced fly Philornis downsi. Populations have declined on several islands, and the species may already be extirpated from Floreana and Santa Fe【1†L59-L66】. Conservation programs in the Galápagos National Park aim to restore habitats and support breeding, with recent reports of modest increases in fledgling numbers【1†L68-L71】.
References
- BirdLife International. (2023). Pyrocephalus nanus. IUCN Red List of Threatened Species.
- Gould, J. (1841). The Zoology of the Voyage of H.M.S. Beagle, Part III. London: Smith, Elder and Company.
- Additional data retrieved from the Wikipedia article on Pyrocephalus nanus (accessed April 2025).