Are your trees healthy?
Winter is the best time of year to consider any tree care on your property. The lack of foliage allows a person to see further into a tree's canopy and identify any risks. Risks could include the possibibility of physical harm to you and others on your property and the overall health of your trees.
Another consideration during this season is the many species of trees (ex. Oaks and Elms) that should only be trimmed during the winter months. This reduces the possibility of contracting diseases. We enjoy working in the winter months because the ground is frozen which allows us to have further access with our heavy equipment while maintaining minimal property damage.
See link below for further information:
http://www.treesaregood.com/treecare/resources/TreeRisk.pdf