So basically, if we were to place a baby on the mother's abdomen, the baby would actually crawl up the mother's chest and choose which breast it would like to latch on to.
VOA: special.2010.08.04
The best analogy I can think of is watching your toddler struggle tocrawlup stairs or climb onto the couch.
His design incorporates a downward-angled port where bats can enter, leading to a 34mm-wide chute with roughened timber walls which they can crawlupto gain access to an attic 10.5m long and 3m high at the apex.