Grant Sizemore

Director of Invasive Species Programs

Originally from Ohio, Grant grew up fascinated by nature and enjoying the outdoors. He earned degrees in Zoology and Environmental Science from Miami University and an MS in Wildlife Ecology and Conservation from the University of Florida. Prior to joining ABC, Grant has worked toward wildlife conservation through policy, outreach, education, and years of wildlife research. Outside of work, Grant enjoys hiking, birding, fishing, and taking care of his (indoor) cat.

A Red Knot stands next to a horseshoe crab on the beach.

With the signing of the Horseshoe Crab Protection Act, New York joins neighboring states, including Connecticut and New Jersey, in taking action to reduce harvest pressure and protect Red Knots and other shorebirds.

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Jan 6, 2026

Migration

Experts from ABC and our partners work throughout the Americas to conserve birds and their habitats.

American Bird Conservancy (ABC) today announced the election of Maribel Guevara as its new Chair of the Board of Directors. Succeeding outgoing Board Chair Larry Selzer, Guevara steps into the new role after serving as an ABC Board member since 2022.

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Jan 6, 2026

ABC Team

For the thirteenth year in a row, Charity Navigator awarded ABC its highest 100 percent score and Four-Star rating, earned by less than one percent of all rated charities. GreatNonprofits, the leading platform for community-sourced recommendations, recognized ABC as a “Top-Rated Nonprofit” for t...

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Dec 15, 2025

ABC Team

A Golden-backed Mountain Tanager perches among vegetation.

Despite uncertainties with federal funding and ongoing environmental rollbacks in 2025, American Bird Conservancy (ABC) stayed focused on our mission, steadfast in our principles, and achieved heartening progress for birds and their habitats across the Americas — helping endangered birds avoid ext...

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Dec 12, 2025

ABC Team