I spent some time working on a farm in southern nsw that grew rice, for those that dont know the process of rice growing and watering, you do it in the summer months, the land is survey'd and large banks are cut in to follow the contours of the ground, which is why if you have ever seen paddocks that are all wiggly in the way they are set up this is the reason.
The water naturally follws the contours of the ground, and you pump from the low end up to the high end and regulate the water through adjustable check stops at each section of that particular contour, these check stops must regularly changed (moving drop boards in and out) at any time of the day and night, so , 2am 25-28 deg, dark and your walking around grass coverd check banks dodging large amounts of frogs and snakes, all types, browns, tigers, red belly blacks, and any other wierd and wonderfull thing thats out to have a feed at night.
The old cockie i worked for would supply you with a shotgun with a mag light tapped to the end of it and you were on your way.
Man i saw some bloody big snakes, aint no real way to avoid them when your standing on a 4 foot high 2 foot wide bank and they dont seem to keen to get wet, Mexican standoff i tell ya.... :|