Female Ruby going for nectar. She does not have the flaming ruby throat of the male. That white patch behind her eye is very attractive. This hummingbird was common at the REGUA feeders and it says (online) that they are common in their area, but it is also mentioned that the bird is on the IUCN (International Union for the Conservation of Nature) Red List.
4716REGUAbirdbirdsflowershummingbirdAtlantic RainforestanimalsClytolaema rubricaudafemaleBrazilian Ruby HummingbirdnaturewildlifeBrazil
From Overview Pantanal and Atlantic Rainforest Gallery