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
青蛙
amphibian、animal、biology、externalsource、frog、herpetology、Library - Animalia、line art、outline、psf、wikimedia commons、zoology
兩棲動物、動物、生物學、外部源、青蛙、爬蟲學、圖書館 - 動物界、線條藝術、大綱、PSF、維基媒體公地、動物學
資料來源：openclipart ( https://openclipart.org/ )