Interesting and very rare migrant species have been found on or seen from Gildersleeve mountain. Tundra swans are expected in fall as they fly over on their way south. Northern harrier, has been seen in the spring. Most spectacular have been western kingbird (fall 2005) and Kirtland's warbler (fall 2004). Uncommon winter visitors have included pine siskins, common redpoll, and evening grosbeak.