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Massachusetts

Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Barnstable
434
220,536
2 Essex
434
239,278
3 Plymouth
395
96,914
4 Nantucket
388
35,256
5 Dukes
387
15,611
6 Bristol
378
63,049
7 Suffolk
356
89,958
8 Middlesex
353
250,496
9 Norfolk
350
90,826
10 Worcester
342
97,813
11 Hampshire
332
124,123
12 Franklin
315
40,440
13 Berkshire
310
70,235
14 Hampden
301
33,073