The Gemara in Sanhedrin 108b says the following:
(Source from Sefaria.org)
(בראשית ו, יב) כי השחית כל בשר את דרכו על הארץ א"ר יוחנן מלמד שהרביעו בהמה על חיה וחיה על בהמה והכל על אדם ואדם על הכל א"ר אבא בר כהנא וכולם חזרו חוץ מתושלמי
[With regard to the verse:] “For all flesh had corrupted its way upon the earth” (Genesis 6:12), Rabbi Yoḥanan says: [This] teaches that [the people of the generation of the flood] mated domesticated animals with undomesticated animals, and undomesticated animals domesticated animals, and all animals with humans, and humans with all animals. Rabbi Abba bar Kahana says: And after the flood all of the creatures returned [to mate with their own species], except for the bird called tushlami, [which continued to mate with other species].
What type of bird is the tushlami? What does it look like? Where is it found?