I have one of your tee shirts, given to me by a friend, with the mascot animal which graces most of the top left corners of your web pages. Friends and I have tried to determine what the little animal is with the big eyes. The lady who gave me the shirt couldn't remember the word. (It's not a wombat.) Please set our minds at ease and tell me which little animal it is. It doesn't seem to be listed on your web site anywhere.
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I think you're referring to the tarsier, who also appears on the cover of this book:
If you click the Colophon tab on that page (below and to the right of the cover image), you can find more info about tarsiers.
Here's an article about O'Reilly's cover animals:
And here's a page dedicated to helping and raising awareness of some of the threatened and endangered animals on our covers:
O'Reilly Media, Inc.