Lost bright yellow and green parakeet named Mango near the park trees in Mattoon-Charleston, Illinois.

I lost my beloved parakeet, Mango, while taking him out for some sun in my backyard. He flew away towards the trees near the park. He is bright yellow and green and is friendly around people but might be scared. He's been with our family for two years, and we miss him dearly. If anyone sees him, please help us bring him back.