- Arremon semitorquatus
Identification
15 cm (6 in)
Male: Shows a yellow mandible (and overall bicolored bill), a broken breast band, broad and dark grey flanks and has no yellow at the shoulder area of the wing.
Female: shows a broken breast band.
Similar Species
Half-collared Sparrow is very similar to Pectoral Sparrow but never shows the yellow shoulder of that species. Half-collared Sparrow is found south of and adjacent to the nominate form of Pectoral Sparrow which differ in flank color, mandible color, and in having a complete breast band (but Half-collared Sparrow is, except for lacking the yellow sholder, more similar in plumage to the northern forms of Pectoral Sparrow).
Distribution
South America: found in south-eastern Brazil (Rio de Janeiro to Rio Grande do Sul)
Taxonomy
This is a monotypic species[1].
This taxon is considered a subspecies of Pectoral Sparrow by some authors[2]
Habitat
Montane forests, living in the understorey and undergrowth; also of second growth and overgrown fields.
Where adjacent to Pectoral Sparrow, Half-collared Sparrow tends to be found at higher elevation.
Behaviour
Diet
They scratch about in the leaf litter, but there is no information available about the actual diet.
Breeding
Their circular nest is constructed from twigs and dry grass.
Vocalizations
Tends to start with some thin tseet notes followed by two long notes of a musical quality, the second in two syllables[3].
References
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Avibase
- SACC proposal to split Half-collared Sparrow from Pectoral Sparrow
- Handbook of the Birds of the World Alive (retrieved December 2016)
Recommended Citation
- BirdForum Opus contributors. (2024) Half-collared Sparrow. In: BirdForum, the forum for wild birds and birding. Retrieved 9 November 2024 from https://www.birdforum.net/opus/Half-collared_Sparrow
