Warren County Connection A Publication of Cornell Cooperative Extension of Warren County
July 2022
SNAGS: DEAD TREES SUPPORT LIFE Dr. Leonard Perry, Horticulture Professor University of Vermont When you hear the word “snag”, you may think of a run in a stocking or pulled thread in a fabric. In the natural and landscape contexts a snag (sometimes called “wildlife tree”) is a dead or dying tree that, hard to believe, can support more life than a living tree. Think of them as wildlife condos. How is this possible? The Washington Department of Fish and Wildlife provides some answers and many details (wdfw.wa.gov/living/snags/).
is one of these “excavators” that, when at work, send the bark chips flying. It is searching for carpenter ants, termites, and other insects in the heartwood of a tree.
Closer to the surface, the inner bark is where other woodpecker species, flickers, and sapsuckers find larval and pupal stages of insects. This is important, especially in winter. These birds use the cavities, also, for nesting and winter protection. Raccoons and black bears may peel the inner bark layer, also looking for insects. The outer bark at the Birds and small mammals use snags for surface is where nuthatches and nests, food storage, foraging for inwoodpeckers look for bark beetles, sects (a staple of the diet for many spiders, and ants. If the bark is parbirds), roosting, and merely perchtially detached, this space provides ing. Hollow trunks, cavities and dead shelter for bats and some butterflies. branches, even on living trees, provide Small cavities are used by house similar “ecosystem resources”. Often wrens, bluebirds, and black-capped wonder where birds go during storms chickadees for nesting. and on cold winter nights? Many retreat to snags. If such trees are near Snags are used for more than food waterways, when they drop limbs or and cover. If you hear a loud tapping fall into the water, these enhance in such dead trees, this resonating aquatic habitats. Experts recommend sound is from woodpeckers announcat least three dead trees per acre to ing their presence during mating. support wildlife. Nationwide, snags Large snags—those 12-inches wide or support over 1000 species of wildlife more and over 15 feet tall—make (www.nwf.org). desirable perches for hunting bird species such as hawks, owls, and even A tree may already have large cavieagles. Many birds, such as swallows ties from rots or other damage, or and mourning doves, use their woodpeckers searching for insects to branches for perches. Tanagers and eat may enlarge the size of caviflycatchers use them for song perchties. The large pileated woodpecker (Continued on page 3)
In this issue: Gardening With Ferns
4
Seed Saving Basics
5
10 Easy Steps to Prevent Common Garden Diseases
6
Land of the Free, Home of 7 the Not-So-Brave Dogs What To Know About Cryptocurrency and Scams
8
Preserving Your Food Dollars
11
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