Mark has been the Science Coordinator at Mass Audubon’s Wellfleet Bay Wildlife Sanctuary since August 2007 and has led birding trips for Mass Audubon since 2002. While his current projects involve everything from oysters and horseshoe crabs to bats and butterflies, he has studied primarily bird ecology for the last 20 years, working on research projects in Kenya, Florida, Texas, California, Arizona, Mexico, and the Pacific Northwest. He was a counter for the famous River of Raptors hawk watch in Veracruz, Mexico, and has birded extensively in Peru, Kenya, Panama, Belize, and both Eastern and Western Europe.
Mark is an emcee and trip leader for multiple birding festivals and leads workshops on birding by ear, eBird, birding apps, and general bird identification. He is past president of the Cape Cod Bird Club and current member of the Massachusetts Avian Records Committee. Weekly Bird Report, Mark’s weekly essay on Cape and Islands bird life, airs each Wednesday on WCAI, the Cape and Islands NPR station. He also co-hosts Bird News, a monthly call-in show all about birds, on WCAI's The Point with Mindy Todd.