Strange DNR Amphibious Vehicle

[RedNekFishR]

I saw a pretty strange looking vehicle being towed by a DNR truck yesterday, and was wondering if anyone knew what it was and what it is used for. It looked kind of like a tank, it had tall sides angled both front and back, with wide tracks that were tucked inside of the sides under the vehicle. It was a one seater with the driver seat and controls that sat pretty high, centered on the front. It also appeared to have mechanical arms that extended from both the front and rear of the vehicle. Really strange looking thing wish i could have snapped some pictures but was driving at the time. Any help identifying this "thing" would be great.
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[dubob]

[font "Comic Sans MS"][#800000]I would guess it is a sprayer vehicle used in the never ending battle against phragmites.[/#800000][/font]
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[kochanut]

i think they call it the mud bug? there is one on base out by the BORTA..... well thats the last place i saw it
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