TT #131 · Parshas Shemini · Aliyah 6 · Passuk 13
Chabad.org — Vayikra Chapter 11 with Rashi
English: These you shall abominate among the birds; they shall not be eaten—they are an abomination: the eagle, the bearded vulture, the black vulture.
Sifra (Toras Kohanim), Shemini, Section 3.
Sefaria — Sifra, Shemini, Section 3
שֶׁקֶץ הֵם. תַּנְיָא, וְאֶת אֵלֶּה תְּשַׁקְּצוּ מִן הָעוֹף לֹא יֵאָכְלוּ שֶׁקֶץ הֵם, הֵם וּמִן – הֲרֵי אֵלּוּ מְעוּטִין, פְּרָט לְחַרְטוֹם וְלַצִּפּוֹרְנַיִם וְלַכְּנָפַיִם וְלַנּוֹצָה שֶׁלָּהֶם.
Textual exclusion — The limiting words exclude the beak, claws, wings, and feathers themselves from the specific food prohibition.
The exclusion applies to the bird itself as food; the listed non-flesh parts are not included in this prohibition.