The hummingbird feeder on our balcony in Bucaramanga is now a success and we get regular visits from 4 different species.
I've noticed a great variation in numbers of visiting males & females of the different species. There seem to be more female Mangoes than male. However, despite seeing many different male White-necked Jacobin, I've yet to see a female. I can only put this down to nesting activities at the moment - the females do all the work of rearing the young, who are fed insects. Perhaps we'll soon see more females, but I've much to learn about the seasonality, or lack of it, in Colombia.
There are 162 species of Hummers in Colombia. Several of these live in and around the city, but we've not seen them on the feeder yet. I'm hoping they'll find it soon.