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Massachusetts

Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Barnstable
435
256,057
2 Essex
435
279,738
3 Plymouth
395
110,471
4 Nantucket
389
40,625
5 Dukes
385
19,740
6 Bristol
377
74,073
7 Suffolk
359
107,806
8 Norfolk
354
107,941
9 Middlesex
352
302,353
10 Worcester
341
117,442
11 Hampshire
334
151,674
12 Berkshire
313
84,968
13 Franklin
312
45,922
14 Hampden
301
38,678