hi-tech hog hunting:thermal eye

[Ivan_Sh]

I"™m currently looking for something new for myself for night hunting and daytime as well.
Guys, I need help. Could you recommend a good heatvision system? That might sound crazy, as they say, but I desperately need it for hog hunting. Such devises like http://www.opticsplanet.net/atn-250d-mm-thermal-eye-camera.html are really good and they worse it, but can I use it to see a hog behind a bunch of trees? In other words, what sort of thermo-visor can I use to see an animal (or at least some arising heat from it) behind trees and other small objects?
If you don"™t know anything specific, could you at least recommend me a website to ask hunters about the heat visors (thermo-visors)?
Regards,
Ivan