Pantherophis bairdi

Pantherophis bairdi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Subfamily: Colubrinae
Tribe: Lampropeltini
Genus: Pantherophis
Species: P. bairdi
Binomial name
Pantherophis bairdi
(Yarrow, 1880)
Synonyms
  • Coluber bairdi Yarrow, 1880
  • Elaphe obsoleta bairdi
    Dowling, 1952
  • Elaphe bairdi
    Conant & Collins, 1991
  • Pantherophis bairdi
    Utiger et al., 2002
  • Pituophis bairdi Burbrink, 2007
  • Scotophis bairdi
    Collins & Taggart, 2008
  • Pantherophis bairdi
    Pyron & Burbrink, 2009[1]
Common names: Baird's rat snake, Baird's ratsnake,[2] Baird's pilot snake,[3] more.

Pantherophis bairdi is a harmless colubrid snake species endemic to the southwestern United States and adjacent northeastern Mexico. No subspecies are currently recognized.[2]

Geographic range

It is found in the United States in the Big Bend region of western Texas, as well as in northern Mexico in the Mexican states of Coahuila, Nuevo León, and Tamaulipas. [1]

Etymology

The species was named in honor of the American zoologist Spencer Fullerton Baird.[4]

Description

Head

Adults can reach 64 to 140 cm (25 to 55 in) in total length (body + tail). The dorsal color pattern consists of an orange-yellow to bright yellow, or a darker salmon ground color, overlaid with four stripes that run from the neck to the tail. The belly is generally gray to yellow, darkening near the tail.

Diet

The primary diet consists of rodents, although they will also prey on birds. Juveniles often eat lizards.

Behavior

They are typically more pleasantly tempered than other rat snake species.

Reproduction

They are oviparous, laying a clutch of up to 10 eggs that take about 3 months to hatch.

Habitat

P. bairdi prefers semi-arid, rocky habitats.

Common names

Baird's rat snake, Baird's ratsnake,[2] Baird's pilot snake, Baird's Coluber, Great Bend rat snake.[3]

Taxonomy

Pantherophis bairdi has sometimes been considered a subspecies of Pantherophis obsoletus, to which it is closely related.

This species has often been placed in the genus Elaphe, but recent phylogenetic analyses have resulted in its transfer to Pantherophis.[5][6][7]

References

  1. 1.0 1.1 The Reptile Database. www.reptile-database.org.
  2. 2.0 2.1 2.2 "Elaphe bairdi". Integrated Taxonomic Information System. Retrieved 29 November 2008.
  3. 3.0 3.1 Wright AH, Wright AA. 1957. Handbook of Snakes of the United States and Canada. 2 volumes. Ithaca & London: Comstock Publishing Associates. (7th printing, 1985). 1,105 pp. ISBN 0-8014-0463-0. (Elaphe bairdi, pp. 214-218 + Figure 67 + Map 24 on p. 235).
  4. Beolens B, Watkins M, Grayson M. 2011. The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Pantherophis bairdi, p. 14).
  5. Utiger U, Helfenberger N, Schätti B, Schmidt C, Ruf M, Ziswiler V. 2002. Molecular Systematics and Phylogeny of Old and New World ratsnakes, Elaphe Auct., and related genera (Reptilia, Squamata, Colubridae). Russian Journal of Herpetology 9 (2): 105-124.
  6. Burbrink FT, Lawson R. 2007. How and when did Old World ratsnakes disperse into the New World? Molecular Phylogenetics and Evolution 43: 173-189.
  7. Pyron RA, Burbrink FT. 2009. Neogene diversification and taxonomic stability in the snake tribe Lampropeltini (Serpentes: Colubridae). Molecular Phylogenetics and Evolution 52: 524-529.

Further reading

External links

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