TT #137 · Parshas Shemini · Aliyah 6 · Passuk 16
Chabad.org — Vayikra Chapter 11 with Rashi
English: the owl, the nighthawk, the seagull; the various kinds of hawk;
Chullin 64b.
E-Daf.com — Chullin 64b (Tsurras Hadaf)
וְאֶת בַּת הַיַּעֲנָה. אָמַר חִזְקִיָּה, מִנַּיִן לְבֵיצַת טְמֵאָה שֶׁהִיא אֲסוּרָה, שֶׁנֶּאֱמַר וְאֶת בַּת הַיַּעֲנָה, וְכִי בַת יֵשׁ לָהּ לַיַּעֲנָה? אֶלָּא זוֹ בֵּיצַת טְמֵאָה.
Textual inference — The unusual expression “daughter of the ostrich” is interpreted as referring to the egg of an impure bird.
The phrase “daughter of the ostrich” is read as a derivation concerning the egg of a forbidden bird.