Shrews are mouse-sized rodents that have a long snout and are of a single color. The rodents have small, sharp teeth that are dark at the tips from deposits of iron meant to harden them against wear. Shrews have a very overpowering smell which can be detected even in a large yard. These pests also go after local birds and eggs, which can be distressing for chicken, duck or geese owners. Trap a shrew like you would a mole with a pit trap.
Locate the area the shrews use as a run by looking for fecal matter. Shrews tend to use a few locations as a toilet. Look in and around the garden, near trees and by the sides of the house.
Dig a hole for your gallon jar. The hole should be deep enough so that the lip of the jar is at the surface of the hole. Place a small amount of grass over the pit trap to hide its location.
Check the pit trap in the morning before the temperature gets too hot. Check the trap four times within a 24 hour period for the shrew.
Take the jar out of the ground once a shrew is caught, being very careful not to be get your hand too close to the animal. Some varieties of shrews are venomous. Release the shrew at least 200 yards from the capture location.