Originally thought to be the larger Cobalt-winged Parakeet, but thanks to Paul Donahue, Rich Hoyer and others now corrected to the smaller, shorter tailed and more compact Blue-winged Parrotlet. They are green with slightly more yellow-green tones on the underparts as seen here. I suspect this is a female which lacks the blue wing and rump patches of the male. Three subspecies are currently recognized. This is the smaller F. x. crassirostris which is more yellow-green overall. This race is sometimes split as a full species, "Large-billed Parrotlet" under the name F. crassirostris. Canon PowerShot SX60 HS.
References:
Collar, N., Kirwan, G.M. & Boesman, P. (2019). Blue-winged Parrotlet (Forpus xanthopterygius). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/54686 on 15 July 2019).
Blue-winged Parrotlet (Forpus xanthopterygius), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/blwpar4
Schulenberg, T. S. & Stotz, D. F. & Lane, D. F. & O'Neill, J. P. & III, T. A. P. & Egg, A. B. (2010). Birds of Peru: Revised and Updated Edition. Princeton: Princeton University Press.