I'm just glad that Uni appreciates wildlife and looks out for them. 
Sounds like they know where to come for food and water.
A big blue jay out back this morning was hollering, and saw him drinking water from a turned over pot's tray. Impossible to keep bird food and water here because the racoons get it, and water becomes disgusting. 
I haven't seen a blue jay in quite a while, mostly cardinals; think we have a family living out back because we always see teenagers every year.
I try to Spd and the wildlife around here definitely knows where the local "soup kitchen" is. 
Would bet you have spruce/pine trees around your house since that's where Cardinals like to nest along with dense bushes. There's plenty of Cardinals around here and I can count 25-30 sometimes when it's real cold w/snow on the ground.
It's interesting to see birds from the North have rolled in which don't spend their summers here or at least I don't see. This includes the attractive native sparrows (Fox, Chipping, White-throated, Song, etc.) and Slate-Colored Juncos. They're all ground feeders, along with Morning Doves, Rufus-sided Towhees (one of my favs, see pic), etc., so I also sprinkle bird food on the ground. Only problem in doing this is it also draws the squirrels in which eat lots of the black oilers.
I may have to ask for bird food as a Christmas present since the birds are eating me "out of house and home"! 
Rufus-side Towhee. Song is "drink your teeeeea".
White-Throated Sparrow
Song Sparrow
(black spot on breast is identifier)
Slate-colored Junco
Note: had to delete some photos since "Message Cannot exceed 20,000 characters".
