we would put out bait and catch a wasp or hornet then carefully tie a small string to it to make it easier to see then let it go after it got some food and follow it as far as possible because it will always take that food back to its nest. rinse and repeat if you loose track of the first one as you should be closer it usually is quicker each time.
we would put out bait and catch a wasp or hornet then carefully tie a small string to it to make it easier to see then let it go after it got some food and follow it as far as possible because it will always take that food back to its nest. rinse and repeat if you loose track of the first one as you should be closer it usually is quicker each time.