Anyone know what this guy is.. Showed up recently looking for a home..

looks like arrowhead..

Sprkplug has it correct. If you don't want them where they are growing transplant them to a shoreline area 1"-6" deep where they can create some good fish habitat in shallow water. They usually will not grow in water much deeper than 12". They will grow among stones that line a lot of pond shorelines.

I think ill let them be for awhile.. Wish I had them over primrose I hate that stuff.. I nuked a buttload of it about a month ago and still have a buttload left..

How similar is arrowhead to lillie pads as far as habbitat they like??

Depending on the species of Lily, it'll grow in water that is 5-8 times deeper than Arrowhead will, depending on water clarity in the spring/early summer.

Just wondering, how do these plants just show up? I found two of these yesterday when thinning out some of my variegated cattails. After making an ID here, I did relocate them.

Bird crap.. Seeds are easily transplanted from place to place by animals, wind, water, fish on the other hand I'm skeptical of bird stockings.