Once you begin feeding birds in the fall, you have make a commitment. A feeder often attracts more birds to an area than natural food sources can support. Thus, if you stop feeding them, the birds might not be able to find enough food to survive. So, if you plan a vacation, be sure to have someone restock you feeder regularly while you are gone. Species we should be careful NOT to attract include bears and moose.
Snags provide "hawking" perches for flycatchers and resting perches for swallows. Flycatchers perch on a branch, fly out to snatch insects, and then return to the same branch to watch for other insects. Large natural cavities, formed in snags by decay, often provide homes for a variey of mammals including marten, porcupine, bats, bushy_tailed woodrats, northern flying squirrels, and other species. When left to decay and fall over naturally, large hollow snags may provide den sites for larger animals like mink, lynx, red fox, and wolverine. To help provide homes for this wide variety of animals, leave dead trees standing whenever possible, particularly snags larger than 6 inches in diameter and/or any containing woodpecker holes or other cavities.