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Piping plovers: a few feathery facts

David L. Ryan/Globe Staff

Piping plover populations deemed threatened and endangered in 1986

Length of piping plover: 7 inches

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Piping plover incubation period: 27-28 days

State-required buffer zone around nests: 200 yards

2012 statewide plover population: 675 pairs

2012 statewide productivity: 0.75 per pair

Estimated chicks per pair needed to maintain population: 1.2 per pair

2010-2012 average productivity in Duxbury: 1.3 chicks per pair

SOURCES: US Fish & Wildlife Service; Duxbury Harbormaster Coastal Natural Resources Department; Scott Melvin, director of state Natural Heritage and Endangered Species Program

Sources: US Fish & Wildlife Service; Duxbury Harbormaster Coastal Natural Resources Department; Scott Melvin, director of Natural Heritage and Endangered Species program in the state Division of Fisheries and Wildlife
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