We, too, had a male broad-tail at our feeders in Roxborough Park on April 7. It's the earliest we have seen in our five years here. Our previous earliest here was April 19, 2013. My wife, who has been keeping records for 30 years, puts feeders out in mid-March, and we have seen broad-tails as early as March 27, when we lived in Golden, which is about 80 feet lower in elevation from where we now live.
John Ealy
Roxborough Park, Douglas County