Alright, lets deal with useful particulars. Is your yard 1/4 acre, 200 acres, or what? Is it a nice mowed yard, native brush, untreed, sparsely treed, heavily treed? What is your budget? This is critical. "Value also matters" is HUGELY relevant to need.
I am no longer involved with thermal demo-ing, but we sold a cheap Pulsar RXQ30V to a guy who happened to need it for killing barnyard vermin. Literally none of his shots were going to be over 75 yards and most were inside 20. He loved his scope. Most other people who got one immediately found it wanting and upgraded to something else. For the barnard guy, it was a great value. For most other folks, it was just cheap.
Thermal does not see through regular glass. That is one of the major drawbacks of thermal, but thermal needs zero light. Night vision does need some light and just how much it needs will depend on whether you get digital NV, Gen 1, Gen 2, or Gen 3, but will it will see through windows.
Camo will thwart NV, but will not thwart thermal.
If you are trying to spot game, thermal wins hands-down, left and right. If you are wanting to navigate around your property, on foot or in a vehicle, NV wins hands-down.
If you need to use an IR source for your NV, brush and limbs and anything that can reflect the light is more of a problem with NV than with thermal. Thermal will see INTO the woods and NV will generally see TO the woods.
So tell us more about your situation and budget. Also, what sort of critters are you trying to see. What is the typical range you want to see and the max range you want to see. Are you wanting to just detect or to be able to identify. This is a controversial word with thermal as many folks make "identifications" that are based on traits other than animal morphology, but that sometimes are quite valid. For example, I often distinguish between deer and coyotes at long distance based on how they move because the resolution isn't there to actually tell them apart based on shape.
So if you provide some details, then maybe I could provide some suggestions that might be useful to your situation.