October Full moon. The Harvest Moon. Oct 2 Monarch butterflies are migrating. October 3 Larch trees, the only northern deciduous conifer, turn yellow. Oct 4-5 After heavy rains, spotted salamanders burrow in the forest leaf cover for the winter.
Marbled salamanders lay eggs in the rising waters of vernal pools.
October 7-8 Look inside goldenrod flowers for yellow crab spiders. Oct. 9 First dark-eyed juncos arrive from the north. Rusty blackbirds begin moving through . Blue jays shift their range about this time. October 10-12 First heavy frosts may occur.