Crocs crocked

A CROCODILE opens its jaws as a boat full of tourists passes. The croc may be thinking of its lunch; it may be yawning, as the aboriginal boatman suggests. Or it could have just swallowed a cane toad. Crocodiles and other wildlife in the Alligator River system draw thousands of tourists each year to Kakadu National Park, on Australia's northern tip near Darwin. A few tourists who swim in these rivers do not come out alive. But now the people-eating crocodiles are meeting their own unlikely match in the form of Australia's most prolific pest, the cane toad.