Le Deutéronome 14:13 Commentaire : Rashi, Chizkuni, Or HaChaim & Siftei Chakhamim

ראה — הראה וראיה and איה and דיה are names for the same bird. Why is it called ראה? Because it sees keenly. And why does Scripture prohibit it under each of its names? In order not to give an opponent occasion to argue, i.e. in order that he who regards it as forbidden may not say, “This is the ראה and is therefore forbidden”, and he who wishes to declare it as permitted will then reply, “But this is named דיה", or “this is named איה and this Scripture has not forbidden”. — In the case of birds, Scripture enumerates by name the unclean species, thus telling you that the clean birds are more numerous than the unclean (in contradistinction to quadrupeds; see vv. 4—5), for which reason Scripture mentions those by name which form the minority (Chullin 63b).

.ראה, איה דיה, דאה “glede, falcon, buzzard and kite;” [none of these species can be indentified with certainty. This is why different translations use some of the names interchangeably. Ed.] According to our author, the four names mentioned here are really one. How is this to be understood? Seeing that we find the expression למינה, “according to its kind (species)”in the singular mode instead of in the plural mode at the end of this verse, they must have something important in common with each other. We find a similar verse in Leviticus 11,14, in connection with the bird called איה, this proves that איה and דיה are two names for the same species. Similarly, ראה and דיה are also the same species. [I have omitted the author’s somewhat convoluted method of proving this point. Ed.]

והראה ואת האיה, and the aforementioned birds, etc. It appears that every one of the 24 categories of unclean birds listed here has numerous sub-categories. This is the reason the Torah does not write למינה, "according to its kind," but למינהו, "according to their kind" (Chulin 63). When the bird mentioned is the only one of its kind or there are only a few variants of that category, the Torah speaks of למינו, "its kind." The proof for this theory is that the Torah does not write למינו in connection with the נשר (often translated as eagle), and the Talmud in Chulin 61 when not certain about a particular bird suggests that it may belong to the family of the נשר. Clearly, the sages of the Talmud considered the word נשר as a collective term for quite a variety of birds of its category.