Treecreepers (Certhiidae)

American Treecreeper (Certhia americana) - HBW 13, p. 182

French: Grimpereau brun German: Andenbaumläufer Spanish: Agateador Americano
Other common names: American Creeper, Brown Creeper

Taxonomy: Certhia americana Bonaparte, 1838, eastern and northern parts of North America.
Formerly treated as conspecific with C. familiaris, but differs genetically and vocally; recent genetic evidence (cytochrome b) indicates that its closest relative is C. brachydactyla. Geographical variation slight and largely clinal, races intergrading where they meet, e.g. those breeding NE USA E from about SE Minnesota and S to N Virginia and Maryland are intermediate between nominate race and nigrescens (for convenience, included within former); on other hand, marked difference between N birds and Mexican ones. “Brown morph” of nominate race in Newfoundland .. View all taxonomy...

Taxonomy: Certhia americana Bonaparte, 1838, eastern and northern parts of North America.
Formerly treated as conspecific with C. familiaris, but differs genetically and vocally; recent genetic evidence (cytochrome b) indicates that its closest relative is C. brachydactyla. Geographical variation slight and largely clinal, races intergrading where they meet, e.g. those breeding NE USA E from about SE Minnesota and S to N Virginia and Maryland are intermediate between nominate race and nigrescens (for convenience, included within former); on other hand, marked difference between N birds and Mexican ones. “Brown morph” of nominate race in Newfoundland described as a separate race (anticostiensis). In S Mexico, proposed races jaliscensis (described from S Jalisco), guerrerensis (from Guerrero) and molinensis (from Oaxaca) all synonymized with alticola. Thirteen subspecies recognized.

Subspecies and Distribution:

  • alascensis Webster, 1986 - SC Alaska (S at least from Mt McKinley and E from Kodiak I); non-breeding also WC USA (Idaho S to SE Arizona and SW New Mexico, E to NW Arkansas).
  • occidentalis Ridgway, 1882 - Pacific coast from SE Alaska S in W USA to NC California, E to coastal slopes of Coast Range in Alaska and British Columbia and W slope of Cascades in Washington and Oregon; non-breeding also occasionally E to CS British Columbia and in WC California.
  • stewarti Webster, 1986 - Queen Charlotte Is (possibly also N Vancouver I), off British Columbia.

     See all 13 subspecies
  • alascensis Webster, 1986 - SC Alaska (S at least from Mt McKinley and E from Kodiak I); non-breeding also WC USA (Idaho S to SE Arizona and SW New Mexico, E to NW Arkansas).
  • occidentalis Ridgway, 1882 - Pacific coast from SE Alaska S in W USA to NC California, E to coastal slopes of Coast Range in Alaska and British Columbia and W slope of Cascades in Washington and Oregon; non-breeding also occasionally E to CS British Columbia and in WC California.
  • stewarti Webster, 1986 - Queen Charlotte Is (possibly also N Vancouver I), off British Columbia.
  • zelotes Osgood, 1901 - E slope of Cascades from S Oregon S through Sierra Nevada to mountains of N, E & S California and E to Nevada; non-breeding also Arizona and New Mexico.
  • phillipsi Unitt & Rea, 1997 - outer Coast Ranges of C California (from San Francisco S to San Luis Obispo County).
  • montana Ridgway, 1882 - breeds interior SW Canada (E from E flanks of Coast Range in British Columbia, N Alberta) and in WC USA from Cascades of Washington and C Oregon E to CN Idaho, NW Montana and W South Dakota and S to S Arizona and extreme W Texas (Guadalupe Mts); non-breeding also W to Pacific coast, E to Wisconsin and Louisiana, and S to N Mexico (N Coahuila).
  • leucosticta van Rossem, 1931 - mountains of S Nevada and WC Utah.
  • americana Bonaparte, 1838 - breeds S Canada from C Saskatchewan and C & S Manitoba E to S Quebec (including Anticosti I and Brion I), New Brunswick, Nova Scotia, Newfoundland and Prince Edward I, also NE USA S to S Wisconsin, NE Ohio, E West Virginia and N Virginia; non-breeding mainly USA (E from Colorado, S to Texas and Florida) and NE Mexico (S to SE Coahuila).
  • nigrescens Burleigh, 1935 - Great Smoky Mts (E Tennessee and North Carolina), in E USA.
  • albescens Berlepsch, 1888 - mountains of SW USA (SE Arizona and SW New Mexico) and NW Mexico (S in Sierra Madre Occidental to NE Nayarit, NW Jalisco and W Zacatecas).
  • alticola G. S. Miller, 1895 - Mexico in Sierra Madre Oriental (S from Coahuila, W Nuevo Leon and Tamaulipas) and Sierra Madre del Sur (Jalisco E to Oaxaca).
  • pernigra Griscom, 1935 - S Mexico (C Chiapas) E to Guatemala (to Volcán de Fuego).
  • extima W. deW. Miller & Griscom, 1925 - E Guatemala (Sierra de las Minas), Honduras and NC Nicaragua (S at least to San Rafael del Norte).