Tim Becker, ZooAmerica naturalist, and Erika McKinney, Fort Indiantown Gap research associate, stand outside the butterfly houses on the grounds of ZooAmerica in Hershey, Pa. The zoo and Fort Indiantown Gap are in the middle of their fifth season on a collaborative conservation project involving the rare regal fritillary butterfly that is found at the South Central Pennsylvania military installation. ( Air National Guard photo by Tech. Sgt. Ted Nichols/Released)

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Size: 1936px × 1291px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: air, airforce, force, military, states, united, usa