Results So Far

Green Darner (Anax junius) the most widespread species on Mass Audubon wildlife sanctuaries

Overview

• As of December 31, 2010, 147 species of odonates have been recorded on Mass Audubon wildlife sanctuaries. This compares with 166 species recorded in Massachusetts and 180+ in all of New England.


• Wachusett Meadow, Rutland Brook, and Arcadia have recorded the greatest species richness (77, 72, and 64 respectively).


• 22 of the 36 species listed by the Massachusetts Natural Heritage and Endangered Species Program as endangered, threatened, or of special concern have been recorded on Mass Audubon sanctuaries.


• Sanctuaries harboring the most state listed species are (Arcadia (6), Lake Wampanoag (5), Canoe Meadows (5), Ashumet Holly (4), and Pierpont Meadow (3).


• The Bar-winged Skimmer (Libellula axilena), recorded at Oak Knoll Wildlife Sanctuary in Attleboro was only the third time this species was observed in Massachusetts and likely the first breeding record in the Commonwealth.

Widespread Species
We have examined 51 wildlife sanctuaries thus far. Some species are very widespread throughout our sanctuary system.

Comparison of our odonate lists with county lists

• 107 of the 126 species on the Worcester County checklist have been observed in our Worcester county wildlife sanctuaries.

• We have recorded more species at our Nantucket County wildlife sanctuaries than are currently on the county list, suggesting that our data can be used to update that list.

• Other counties in which our wildlife sanctuaries contain over 70% of the species in the county list are Hampshire and Barnstable counties.

Coastal Plain Pond shore at Ashumet Holly Wildlife Sanctuary, East Falmouth.

Under-represented species
Of the 147 species located on Mass Audubon wildlife sanctuaries, 63 percent are considered generalists, meaning they can be found near many different types of aquatic habitats. Mass Audubon sanctuaries also contain a good representation of the species of two specialized habitats: bogs and coastal plain ponds.

Less well represented at our sanctuaries are the species that prefer flowing waters such as rivers and streams. These include a number of the emeralds and clubtails.

A high percentage of species associated with flowing waters are considered endangered, threatened, or of special concern, so it’s not surprising that we have recorded a smaller percentage of this group.

Habitat preferences of all Massachusetts ode species compared to those found on Mass Audubon wildlife sanctuaries.

These results points to the particular importance of protecting rivers and cold water stream habitats, which harbor these often rare odonates.

For more details of our results, contact Robert Buchsbaum or download the complete project report (PDF 1.4MB).

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