I'm Wish we had that many! Most I've ever seen was 3. I live about 25 miles N. of Seattle WA. They stay year around or the females do, I don't think its the Males I see in the Cold! 'Anna's Humming birds' are what we have here most often. I make my Sugar water stronger in the winter so it won't freeze up! Works great and its good for the Birds too gives them More Energy for the Cold weather.