Warren Photographic Image Library of Nature & Pets
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WP20645

Brown Rat (Rattus norvegicus) skull showing how lower jaw is moved forward so that upper incisors can be used to scrape away and sharpen lower incisors.
                
Brown Rat skull
WP20645 Brown Rat (Rattus norvegicus) skull showing how lower jaw is moved forward so that upper incisors can be used to scrape away and sharpen lower incisors.
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