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| Damselflies mating on a yardstick by Oyster Pond. | Damselflies are numerous on Oyster Pond. | Damselflies on a yardstick mate in a distinctive heart shape. |
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| Dragonfly lands on a dock at Oyster Pond. | Alewife spawn begin to congregate to return to the ocean after hatching in Oyster Pond. | Alewife gather to negotiate the weir back to spawn in Oyster Pond. Spring 2001.
Photo by Pat Lohman. |
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