DURHAM, N.H. — The U.S. Forest Service says a warm spring appears to be responsible for turning brown the needles of some pine trees across the Northeast.

The Forest Service says minor damage to white pine trees has been reported across New York, Vermont, Connecticut and New Hampshire and parts of western Massachusetts and Maine.

Kyle Lombard, New Hampshire’s Forest Health Program coordinator, says he’s gotten more calls on the discoloration of the white pine trees than any other forest-damaging event in recent years, including the 1998 ice storm.

Vermont State Forest Health Coordinator Barbara Burns says the browning of the needles began to show up following the unusually hot spring.

The trees are expected to recover in the next few weeks.