Lasiurus borealis


Scope Severity Immediacy
Low Low High
Summary Rank: G

LABO utilize riparian woodlands, and other tree roosting bats are known to use tree or water habitat edges near urban areas in CO (Everette et al. 2001).  Irrigation has increased available habitat perhaps facilitating the movement of more LABO throughout the state (Fitzgerald et al. 1994), and at the same time increasing potential exposure to sources of contaminants. It is well documented that organochlorine pesticide residues accumulate in body tissues of insectivorous bats (Clark 1981, Bennet and Thies 2007, Geluso et al. 1976) and insectivorous diets may lead to substantial pesticide loads (Clark 1988).  Detectable concentrations of elements such as mercury have been found in fur samples (Hickey et al. 2001).  The effects of contaminants from urban areas can be wide-ranging and all species are at some risk from contaminants.  

Back to Search Page