Midrash on Ezekiel 31:13: Bereshit Rabbah & Classical Sources

עַל־מַפַּלְתּ֥וֹ יִשְׁכְּנ֖וּ כָּל־ע֣וֹף הַשָּׁמָ֑יִם וְאֶל־פֹּארֹתָ֣יו הָי֔וּ כֹּ֖ל חַיַּ֥ת הַשָּׂדֶֽה׃

Upon his carcass all the fowls of the heaven do dwell, and upon his branches are all the beasts of the field;