Don Markstein's Toonopedia: Fraidy Cat

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Donald Duck, Ultimate Pop Culture Wiki

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Don Markstein's Toonopedia: Thundercats

Don Markstein's Toonopedia: Sylvester and Tweety Mysteries

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Pogo (comic strip) - Wikipedia

Ira Schnapp in DODO & THE FROG, NUTSY SQUIRREL and RACCOON KIDS - Todd's Blog

John Glenn Taylor's Easily Mused: Panels 66: Funny Animal Has-Beens

Don Markstein's Toonopedia: Captain Pugwash

Sylvester (Looney Tunes), Ultimate Pop Culture Wiki