The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

The 2017/18  impact factor of the Herpetological Journal is 1.268

pdf 03. Food habits of the racer (Coluber constrictor mormon) in the northern part of its range


Open Access


Authors: Christopher H. Shewchuk And James D. Austin

Abstract: Dietary habits of the racer, Coluber constrictor mormon, were studied based on stomach and faecal contents from 26 road killed specimens and 297 live animals collected in the field during 1992-1994 in southern British Columbia, Canada. Thirty percent of the specimens examined contained gut contents. Coluber constrictor mormon feeds mainly on insects (91% of prey; Acnd1dae > Gryllidae > Tettigoniidae > Gryllacrididae) and occasionally rodents (7.5% of prey), as well as frogs and snakes (both < I %). There were proportionally more vertebrates in the diets during the early part of the season (April - May). Diet was related to individual attributes, such as size or sex of the snake. Thus, larger individuals - primarily females - were more. likely to . feed on vertebrates, although insects were not absent from the diet of larger individuals. Diet composition (mammals vs. insects only) did not depend upon the method of sampling snakes. This study adds to the growing number of dietary studies on Coluber constrictor that continue to provide insights into the evolutionary ecology of this widespread but poorly-known species.

Keywords: Coluber constrictor, feeding ecology, British Columbia, Canada, diet, food habits

Download Access:

The latest 20 issues can be downloaded when logged in with a Herpetological Journal subscription membership.

Individual articles can be purchased for download.

Older issues and occasional Open Access articles are available for public download


For further information and submission guidelines please see our Journal Instructions to Authors

pdfBHS Ethics Policy

NOTE: as of January 2017, all new editions of the HJ are ONLY available online via the BHS website. The BHS no longer has a commercial hosting agreement with Ingenta  -  although editions prior to end 2016 remain accessible on Ingenta .  Those editions are of course also accessible on the BHS website for subscribers with an active and valid membership.  Should you experience any difficulty accessing HJ editions via the website or have any queries in this regard, please contact