It was a parakeet. ): RIP.
Most Helpful Guy
Tempt it with food, if you know where it is.1
Most Helpful Girl
There's a chance that he will still come back in the morning.
You will not hear him after dark, as he most likely found a place to sleep for the night.
If you have a second cage, put it next to the first cage, add food and leave the door open. If he's hungry, he should go inside the cage to eat. When he does, all you have to do is close the door.
Wishing you the best of luck.2