First Appearance: Moon Knight (vol. 2) #1 (June 1985): "Night of the Jackal"
Number of Appearances: 1
Enemy of: Moon Knight
Worked for: Anubis the Jackal
Note: trained falcon of Anubis the Jackal
Horus was the trained falcon of the villain known as Anubis the Jackal. (His real name was Ahmad Azis.) Obviously Anubis named his falcon after Horus the classical Egyptian falcon god. Anubis's trained falcon was presumably killed when Anubis's temple was destroyed with him and the falcon in it.
Suggested links for further research about this character and the character's religious affiliation: