Yellow-chevroned Parakeets

April is the month when the mandacaru cactus (Cereus peruvianus) frutifies. It´s fruits are red with a delicious white flesh. Many animals love them but most of all the parakeets. The cactus become hotspots for birdwatchers and any other nature interested person ... 
These are a yellow-chevroned parakeet (Brotogeris chiriri, periquito-de-encontro-amarelo) and a monk parakeet (Myopsitta monachus, caturrita) in the background.

And why are they called "yellow-chevroned parakeets" ? Here is the answer: