Most of us spent our summers doing the standard things, from yard work to browsing farmers? markets, maybe a camping trip or two. Ask UW-Madison botanist Don Waller how he spent his summer, however, and you?ll likely feel your summer was somewhat lacking in excitement. Waller spent a good part of his summer staring down feral camels in Australia. It seems they are a problem there, much as we have problems with feral cats. Only these are camels. And there are lots of them.