This sparrow is quite common in places across much of South America and even up into Mexico. I first saw it on my travels in the Dominican Republic some 15 years ago, and have seen it in Peru as well. But on the VZ tepuis, it seems to be a relic species with no suitable habitat connecting it to any other population of the birds. Phone Darwin, as it seems like a brew for a new species to be born in the next maybe 1,000 years?