Source: http://commons.wikimedia.org/wiki/File:Chimpanzee_%28PSF%29.jpg This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain. 未選中 動物 哺乳動物 灰度黑猩猩
orangutan wood cut illustration from 1923 "ABC Book" by C.B. Falls (LCCN: 23002228); http://openlibrary.org/b/OL13440008M 猩猩 靈長類動物 動物 猩猩木切
This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain. --- See http://commons.wikimedia.org/wiki/Category:Pearson_Scott_Foresman_publisher 動物 哺乳動物 生物學 軋製線頂杆