Cobalt-rumped Parrotlet Forpus xanthopterygius

Tiny parrot with green body, short pointed tail, and pale bill. Males have cobalt-blue wings and rump; females are all green. Highly gregarious. Found in light woodlands, forest edges, second growth, open habitats, and urban parks, but typically avoids dense forests. Widespread from Bolivia across much of eastern Brazil, as far south as northeastern Argentina.