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[HBW - BirdLife (v3)] |
02/05/2024 03:14:04 AM |
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| Species Details [Taxonomy: HBW - BirdLife (v3)] |
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Large-billed Sparrow* |
Id (Atlas): |
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Passerculus rostratus |
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Description (10)
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Large-billed Sparrow
© birdaz.com
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Family
Passerellidae (New World Sparrows)
Size
14 cm
First Described (Guide)
(Cassin, 1852)
Mexico, USA.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2012).
Status LC
For more information see BirdLife International Species Factsheet.
Subspecies
Savannah Sparrow (Passerculus sandwichensis) and Large-billed Sparrow (Passerculus rostratus) (Sibley and Monroe 1990, 1993) have been lumped into Passerculus sandwichensis following AOU (1998), which also includes beldingi, contra Stotz et al. (1996) who treat sandwichensis, rostratus and beldingi as separate species in the genus Ammodramus.
Genus sometimes subsumed in Ammodramus. Traditionally treated as conspecific with Savannah Sparrow (Passerculus sandwichensis) and Belding's Sparrow (Passerculus guttatus), and often also with San Benito Sparrow (Passerculus sanctorum), but all differ in morphology and plumage and, to some extent, in ecology and separation at species level supported by recent molecular-genetic findings. Geographical variation of present species apparently clinal, but difficult to determine as populations not distributed continuously along coast.
Considered by some authors to be a subspecies of Savannah Sparrow (Passerculus sandwichensis).
The following 2 subspecies are recognised:
- rostratus (Cassin, 1852) - Breeds in north-eastern Baja California (delta of R Colorado, San Felipe) and north-western Sonora (mouth of R Colorado south to Patos I), in north-western Mexico. Non-breeding north to extreme south-western USA (Salton Sea, Santa Cruz and Channel Is, all in southern California) and on both shores of Baja California south to Cabo San Lucas. Considered by some authors to be a subspecies of Savannah Sparrow (Passerculus sandwichensis).
- atratus van Rossem, 1930 - Breeds from coast of Sonora (Tepopa Bay and Kino Bay) south to central Sinaloa (El Molino). Non-breeding individuals perhaps wander to extreme southern Baja California. Considered by some authors to be a subspecies of Savannah Sparrow (Passerculus sandwichensis).
References
See References.
Files:
BirdLife International
For more information about the Large-billed Sparrow see...  BirdLife International Species Factsheet.
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