Richard Primack’s lecture topic is Walden Warming: Climate Change Comes to Thoreau’s Woods. He is currently investigating the impact of climate change on the flowering and leafing-out times of plants; the spring arrival of birds and the flight times of insects in Massachusetts, Japan, and South Korea; and the potential for ecological mismatches among species caused by climate change. The main geographical focus is Concord, Massachusetts, due to the availability of extensive phenological records kept by Henry David Thoreau and later naturalists. He is using Concord as a living laboratory to determine the effects of climate change species, and land use changes on the population dynamics of native and non-native species. He is also comparing results from Concord with long-term changes at Acadia National Park in Maine. Richard Primack Bio.