Techniques helpful in determining percent biomass in raptor 
diets (Steenhof) and raptor prey species abundance (Fitzner) 
are presented and Wendland shows how owl pellets can be used 
bo Study frog distributions Finally, 2£ anyone has ever 
doubted the commercial value of amphibians, Nair and Prabhu 
describe how frog wastes can be converted into little cakes 
to be used for chicken feed. 
In the event that it would be desirable to elaborate on 
this inaugral compilation, I present the sources included 
thus far. The first few references were obtained from the 
text Biology of the Amphibians by Duellman and Trueb 1986 
and from the files of Professor Margaret M. Stewart. Two 
computer searches covering Biological Abstracts from 1975 to 
1985 provided several more references. Copies of these 
articles were obtained and their bibliographies supplied 
further titles. The majority of the citations were, 
however, obtained by searching through the Zoological Record 
from 1864 to 1983. 
I wish to thank Dr. Margaret M. Stewart of the State 
University of New York at Albany for her assistance and 
encouragement. Readers may send additions and corrections 
to William E. Cook, Columbia-Greene Community College, 
Box 1000, Hudson, New York 12534. 
