Our strange white winged sparrow

Here are the first somewhat decent pictures we have managed to get of our allusive white winged sparrow. We think we have a few of these genetically strange birds in our neighbourhood. We have seen them frequently at our feeder this summer but can not find anything like it in any bird books or even online. as you can see they hang out with the sparrows and act like sparrows, they just have these beautiful white tipped feathers. One has full white feathers on the edges of the wings creating a V white line when sitting. Pretty cool birds but very shy. They normally sit well back in the cedars and always take off when we pull out the camera. I took these shots from inside our garage.