Sat at home, from the corner of my eye i saw the usual birds flying outside and a black disc like shape started hovering and then floating on a straight path. it was high, above the trees. it was all black, disc shaped and moved with a tilting motion. travelling in a straight line tilting until i lost sight of it past the window frame i was looking out of. i was shocked, and couldn't think of what it could be... hoping it wasn't just a drone or something but it had such a weird shape and movement. it definitely wasn't a bird, or a weather balloon or a plastic bag.