Reference for Chullin 130:14

אף כל שיש לו ארבע רגלים וארבע כנפים וקרצולים וכנפיו חופין את רובו

is not that of the hargol, neither is the distinctive feature of the hargol tha the arbeh, and the distinctive feature of each of these two is not that of the sol'am, neither is the distinctiv feature of the sol'am that of either of these two.

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