I can't believe you can live with BW in your back yard, this story makes my hair stand straight but let me tell you my "little" spider story.
My best friend and I shared a house, and he had this lovely hobby of keeping tarantulas (about 35 of them). All of course where in glass terrariums.
The first months I checked my bed every night before go sleeping and I will check my shoes and clothes in the morning... really nice....
After a while a got used to them and even give them water and food when he was away.
Sometimes they will also run away of course and we had demount all house looking for this things (they where all about the size of a stretched hand).
I tell you sometimes I was thinking I got completely idiot....
Anyway there was one in particular that often went for this "walking around our place" and especially when my friend was gone.
Of course I got blamed for leaving the terrarium open after giving water ecc...
But every time I made sure that this stupid glass door was shut.
I couple of times I saw that spider doing "funny movements" with his front legs against the glass door and so I told him.
Of course he called me crazy for thinking that a spider could think of opening a door I was laughed after for almost six months. But I really could swear that when I was sitting there reading in silence this spider was doing something with that door.
After months waiting and a couple of evenings spent looking for this silly animal ...we got to see th whole thing.... together ......
The spider got his front leg on to the door (quite heavy for such a little think) slowly let it slide and in 15 minutes he was able to crawl out!!!!!!
Maybe a brain of a cat is able to do that....but a spider?????
My friend, he could not believe it and never told it any body.
Me? I believe spiders are some kind of undercover creatures......
Sorry my English is not that great!