Large-billed Sparrow © flickr.com

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).

Files:

More Information

BirdLife International For more information about the Large-billed Sparrow see... BirdLife International Species Factsheet. Articles about the Large-billed Sparrow If you would like to read any articles about the Large-billed Sparrow... Show Articles (0) No Pictures of Large-billed Sparrow If Birdpedia has no pictures of Large-billed Sparrow or you would like to see more, then try the following...       From BING (0) No Videos of Large-billed Sparrow If Birdpedia has no videos of Large-billed Sparrow or you would like to see more, then try the following..       From BING (0) Where can I observe this species? Select an area (or leave blank) to see locations where this species has been recorded. Area   MEXICO   All    Optional: Complete the following if you wish to restrict the reserve to within a given distance of a location. Please enter the Latitude and Longitiude of a given location together with the maximum distance (km) to display a list of reserves within that distance. You must enter a Latitude, a Longitude and a distance greater than 0.   Latitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          N S or   GPS help Longitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          E W or   Find GPS using Google Maps Distance Bearing     N NE E SE S SW W NW Get Sample GPS readings On What Field Trips was this species observed? Select an area (or leave blank), and a date range, to see field trips on which this species has been recorded. Area   MEXICO   All    From To     Optional: Complete the following if you wish to restrict the reserve to within a given distance of a location. Please enter the Latitude and Longitiude of a given location together with the maximum distance (km) to display a list of reserves within that distance. You must enter a Latitude, a Longitude and a distance greater than 0.   Latitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          N S or   GPS help Longitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          E W or Distance Bearing     N NE E SE S SW W NW Get Sample GPS readings Latest Sightings for Large-billed Sparrow Select the Area to restrict the Sightings. Area   MEXICO   All