Mexican species

       
Brown Creeper (Certhia americana)
Mexico The Mexican Republic Aguascalientes Baja California Guadalupe Baja California Sur Campeche Chiapas Chihuahua Coahuila Colima Revillagigedos Revillagigedos Ciudad de México Durango Guanajuato Guerrero Hidalgo Jalisco México Michoacán Morelos Nayarit Tres Marías Nuevo León Oaxaca Puebla Querétaro Quintana Roo Cozumel San Luis Potosí Sinaloa Sonora Tabasco Tamaulipas Tlaxcala Veracruz Yucatán Zacatecas
Subspecies Hide subspecies
alascensis occidentalis (occidentalis) Breeds south-central Alaska; winters to Arizona and New Mexico.
occidentalis occidentalis (occidentalis) Coastal se Alaska to central California (south to Marin County)
phillipsi occidentalis (occidentalis) Resident in Coast Ranges of central California (San Mateo County s to San Luis Obispo County)
stewarti occidentalis (occidentalis) Haida Gwaii (British Columbia)
zelotes occidentalis (occidentalis) S Oregon through Cascades and Coast ranges to s California
idahoensis montana/idahoensis (montana/idahoensis) N Idaho and nw Montana to central Alberta; winters to Arizona
montana montana/idahoensis (montana/idahoensis) British Columbia to Cascades, Dakotas, s Arizona and w Texas
americana americana/nigrescens (americana/nigrescens) Breeds northern Saskatchewan to Newfoundland and northeastern USA; winters to Mexico.
nigrescens americana/nigrescens (americana/nigrescens) Great Smoky Mountains of Tennessee and North Carolina
albescens albescens/alticola (albescens/alticola) Mountains of se Arizona, sw New Mexico and nw Mexico
alticola albescens/alticola (albescens/alticola) Mountains of s Mexico
pernigra pernigra (pernigra) Mountains of extreme s Mexico (Chiapas) and n Guatemala
extima extima (extima) Mountains of e Guatemala, Honduras and nw Nicaragua
Endemic status
Sound Guide x2,30,32x
Comment Birds from Mexico have been suggested to pertain to a separate species, but due to clinal differences remains as one.

And being the only certhia species in the Americas identification is straightforward, though, as always, can still be difficult to spot.

Mexican birds from the Central Volcanic area are generally dark bellied and have whitish streaks on the back compared to other subspecies.

The species is closest to Short-toed Treecreeper in DNA and appearance, showing both a white alula edge, whitish throat contrasting with the darkish breast and belly, and probably the same distribution of primary tips on the folded wing. Plus the short hind claw.

Apparently the tail of Brown is more obviously streaked; a character only faintly visible on both the European species.
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