Ask many a grade-schooler (and many an adult, for that matter) what animal the _korban pesach_ is, and he'll tell you "a sheep".<sup>[1]</sup> In fact, it can be a sheep or a goat. (It's explicit in [_chumash_](http://he.wikisource.org/wiki/%D7%A9%D7%9E%D7%95%D7%AA_%D7%99%D7%91_%D7%94) (_pesach MItzrayim_) and [_halacha_](http://he.wikisource.org/wiki/%D7%A8%D7%9E%D7%91%22%D7%9D_%D7%94%D7%9C%D7%9B%D7%95%D7%AA_%D7%A7%D7%A8%D7%91%D7%9F_%D7%A4%D7%A1%D7%97_%D7%90_%D7%90) (_pesach doros_).) Do we have some tradition (or historical evidence) that it was usually a sheep? If not, how did it happen that people associate the _korban_ with a sheep? --- <sup>[1]</sup> I have no empirical evidence to offer as far as asking people: it's just my impression. But *all* I can find using Google (that discusses the _pesach_ as a goat without mentioning that it can be a sheep) is discussing individual cases in which someone brought a goat (including, of course, the case in _parashas Tol'dos_), plus [one blog post](http://emunatidbits.wordpress.com/2009/04/02/did-you-check-your-goat/). On the other hand, there is much mention of the _pesach_ as a sheep without mentioning that it can be a goat; see e.g. [a `vbm-torah.org` article](http://www.vbm-torah.org/pesach/pes61-yg.htm) and [a `torah.org` article](http://www.torah.org/learning/yomtov/pesach/5756/vol2no01.html).