The OP was asking about double duty, day and night. I don't think a thermal is going to help in daylight.

I recently bought an AGM Taipan thermal monocular to pair with my old faithful Sightmark Wraith night vision with an upgraded illuminator.

The thermal is amazing for finding animals without using the rifle to spot.

I'm hunting in a hayfield hedgerow and have a clear view of approaching animals.

In a forest, a thermal is great and the night vision does reflect and doesn't give nearly the same definition.

The Night Vision scope is a camera that works in daylight for shooting or sighting in, or dark with an illuminator .

"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen