Cute little guys and I think they should sell well. As others have said, they are not Takahashi, but are obviously made as reproductions of what the Takahashis created. Given the cards with clear attribution to origin, definitely not any attempt here to misrepresent. Takahashi birds also came (sometimes?) with cards, similar to these, identifying the specific bird and signed by Takahashi.
I suggest you list separately, and also provide a bit of discussion in description explaining that these are created in the style of the famous Takahashi birds, and perhaps a bit of history. People seem to love these birds and just having carved wooden bird pin wire legs as keywords should bring a lot of views. Might be good to give a bit of spacing to closing time if you list as Auction format, to allow anyone who wants more than one to work on last minute bidding.
