Food, Water, Habitat.
Habitat for me is the thing I would always forget.
I was sitting outside, as one does, looking over my immediate landscape and wondering why some birds happily came into my yard while others did not.
I used to have bird feeders, but I tend to now use natural plantings while my neighbor right next to me have feeders.
I have found placing food near 'safe' habitat dramatically increased the amount of smaller birds to my plot. There isn't a lot of tree protection from Arial predators, but when I put together a five foot brush pile I suddenly had so much more action in the area.
My wife hates snakes. I have gotten her to not instantly try and kill them and perhaps not to yell alerting the neighbors to their presence because the ones in my area are all harmless. She was frusterated at why they were only in the front yard and not the back.
Habitat I created some rubblestone spaced out rocks with a little dig into the earth and next thing I know the snakes have moved to the backyard where my garden is assumedly because it is closer to their food (slugs/mice/voles).
I'm still trying to understand my
local cardinals. I never had as many as now when my neighbor parked three junk vehicles by his barn. They love to perch on the trucks!
Animals are interesting, odd, and a plain joy to watch. I hope you the best in drawing them in!