Pictorial Key to Droppings
NPCA Field Guide to Structural Pests
By: Eric H. Smith, Richard C. Whitman
Published by: NPCA [National Pest Control Association?], 1992
The NPCA Field Guide to Structural Pests contains many wonderful specimens of informational graphics. One of the most interesting of these charts is presented here: "Domestic Rodents and Cockroaches: Pictorial Key to Droppings." Click on the droppings to see an enlargement.