The hummingbirds have returned to Kelowna now. Our Anna's survived in to the second week of January and we were very saddened to lose her. It was difficult changing out the sugar water two and three times per day; once the temperature hit -10 the solution would cloud over within two hours. Several people from bird watching groups came over to see her feed in the snowy landscape, but this year we will be more cautious and remove the all the feeders by the end of September to discourage any future Anna's from taking the risk of staying in Kelowna over winter. It was two days of -17 and blowing snowing that finished her we believe, along with the harassment she received from the flickers who chased her through the yard when she tried to feed.
We did go through earlier photos we had taken of the various humminbirds over the years and we found that Anna's do come here regularly along with the Rufous, Black Chinned, and Calliope, but we feel a little ashamed that we made fun of the Anna's thinking they were merely an overweight Calliope. My very good friend has a number of websites devoted to light humour, one of them is based on fantastic creatures rarely seen in nature. He was amused by our description of the incredibly large hummingbird that frequented our feeders back in the spring of 2011, and after some careful research he identified it as a "Hummster" and immortalized our ignorance on his site: http://www.bunguin.com/?p=92
Have a great season, keep your feeders clean, and be sure to discourage hummingbirds from staying in Zone 5 over the winter, it just gets too cold!