Negative commandment · Lo Ta’aseh #174 of 613
Not to eat non-kosher birds
שלא לאכול עוף טמא
The verse · Vayikra 11:13
וְאֶת־אֵלֶּה תְּשַׁקְּצוּ מִן־הָעוֹף לֹא יֵאָכְלוּ שֶׁקֶץ הֵם אֶת־הַנֶּשֶׁר וְאֶת־הַפֶּרֶס וְאֵת הָעׇזְנִיָּה
“And these are they which you shall have in abomination among the birds; they shall not be eaten, they are abominable: the eagle, and the bearded vulture and the black vulture.”
The Rambam’s words
Not to eat non-kosher birds, as [Leviticus 11:13] states: "These birds you must regard as detestable. Do not eat them."
שלא לאכול עוף טמא, שנאמר "ואת אלה תשקצו מן העוף, לא ייאכלו" (ויקרא יא,יג).
Why · Sefer HaChinuch #157
To not eat impure fowl
“It is from the roots of this commandment [that it is] because the body is an instrument of the soul — with it, it carries out its activity; without it, it can never complete its work.”
Who & when
“And [it] is practiced in every place and at all times by males and females.”
Where in the Mishneh Torah
Hilchot Forbidden Foods הלכות מאכלות אסורות