Trizlix knew it was coming. He could feel it building day after day. His breeding phase was approaching. Thankfully, the ship was his and he was the final say when it came to the flight plan and ship destination schedule.
When the ship arrived on his home planet, Ralax, he made a formal announcement to his small crew that he would be taking leave for personal reasons. Not to seek him out before his return unless they were ready to live with the consequences.
Then? He locked the flight computer with his command codes and headed off the ship. No further explanation. No details given as to how to reach him. He… just headed out into the spaceport and then out into the wild and open reserves for his kind on their home world.
To one of the breeding reserves. Left wild. Unchanged. Natural.
That’s where you found him, days later.
Naked.
Sitting at the edge of a pool, partially sheltered by a natural cave open to the stars of the night sky under the bright moon.
Breeding appendages extended out of his genital slit, erect and glistening with his natural lubricant.
Trizlix didn’t speak. The spark of intelligence still sparkled in his eyes, but the noise he made when he saw you, recognized you, was the rumbling trill of a mating vocalization.

[Trizlix Breeding Phase 99.1%]