I can't see any images of road junctions from 'Stoons last post on this thread either. Otherwise, I don't see any current technical difficulties.
And now, from 'They Might Be Giants'
http://www.youtube.com/watch?v=6kJD2N2gvqw&NR=1
Bird Trap Cat Feeder
US Patent Issued In 1979
Food for thought from the inventor; "Heretofore, the ordinary sparrow has greatly proliferated, thereby taking the place of more popular birds, such as the canary, blue bird, wren, swallow, and other birds that are appealing to the eye and enjoyable to listen to." He continues; "The invention provides means for continuously trapping sparrows and supplying a cat and neighborhood cats with a supply of sparrows. The cat feeder by its design is self-cleaning since the cat quickly learns to remove the sparrow from the cage."
Here's how this little death trap feeds your feline; the hole next to the perch (#32) is sized to invite sparrows in for a visit. Said sparrow, thinking… ah ha, a new home, walks into the avian casa and alights on the provided indoor perch. The weight of the bird on the perch opens a trap door and the bird sees his escape route, a window (#36). But birds don't understand the concept of glass and while he's trying to flutter home to his family, the trap door closes and there's no where to go but down the gutter, literally. The cage's mesh openings are designed to let smaller songbirds escape, but hold the doomed victim until Fluffy has had her happy meal, both a snack and a toy. Meowouch!
