Rabbi Ami the Kohen. A) [Chulin (K67b)]. In the chapter of the foreleg, he was privileged with a share of dinars that were sent to the yeshiva, for since he was the head of the yeshiva, he was preferred over his brothers. Rashi explains that he was privileged to allocate his portion to the students of the yeshiva and not for himself.
In the chapter of "These are found" [(28b)], he found a bundle of dinars and said to him, "You should not fear, for we are not like the Persians." And the author of the Tosefta of the Books of Teachings wrote that this refers to the chapter "The Torah commanded," which contains seven words corresponding to the seven books [(Baba Batra 14)]. He was engaged in matters and saw a raven that abandoned its young [(because they were white)] and after three days, he saw them excreting and mosquitoes were born and consumed them [(and they turned black)].
This is as it is stated, "To the young of the raven which cry out, or who prepares for the raven its nourishment" [(Midrash Shmuel, and in Midrash Rabbah, Parashat Metzora, chapter 19, Rabbi Asi, etc., the matter is explained differently, and see Ketubot (49b) in Rashi)]. And in the Tosefot on Chulin, there are two types of ravens, and the deep ones are white. [And it is written in the genealogies in the gloss that there is a place in India where there are white ravens.]
Seder_HaDorot,_Tanaim_and_Amoraim.567:1