If you’ve recently noticed more bright-green parrots flying overhead, you’re not alone. After pairing off to breed during the spring and summer, nanday parakeets are gathering in larger, noisier flocks as their young join the group. And if you haven’t seen them, you’ve probably heard them. Their distinctive, high-pitched squawks and screeches – often sounding like “kree-ah, kree-ah” or “chriie…