Emerald-green parakeet with yellow head

I lost my emerald-green parakeet with a bright yellow head yesterday around 3pm. It slipped from its cage while I was loading groceries outside my apartment on Park Ave near the Worcester Common, and I think it fluttered toward Green Street Park. The bird is about 9 inches long, with a blue-tinted tail and a small orange patch on the wing. It wears a silver leg band etched '04A' on the right leg. This bird is a cherished gift from my daughter, and I'm really hoping someone who finds it will bring it back safe and sound.