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Massachusetts

Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Essex
435
239,397
2 Barnstable
434
220,593
3 Plymouth
395
96,947
4 Nantucket
388
35,261
5 Dukes
387
15,617
6 Bristol
379
63,077
7 Suffolk
357
90,024
8 Middlesex
353
250,567
9 Norfolk
350
90,857
10 Worcester
343
97,864
11 Hampshire
332
124,182
12 Franklin
315
40,452
13 Berkshire
310
70,247
14 Hampden
301
33,081