None. Out of the range.
1. Depends on time of the year.
2. Depends on the year.
Best data set you are going to get is the link below. You will get a minimal number for any month in any year if you record each sighting.
Things get complicated as there is also an Allen/Rufous entry.
Also disparate locations have been shown to be the same bird.
Probably safe to say: never more than 100 at any given time with 20 more likely; with there being times of Zero birds present.
http://ebird.org/ebird/map/rufhum?bmo=01...
749 give or take a few .
I need a population estimate
