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Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Worcester
401
89,699
2 Baltimore
371
152,403
3 Anne Arundel
354
106,724
4 St. Mary's
348
28,008
5 Montgomery
341
198,377
6 Calvert
338
40,939
7 Prince George's
338
84,566
8 Dorchester
334
39,980
9 Queen Anne's
334
38,872
10 Talbot
331
46,981
11 Harford
326
45,707
12 Cecil
320
19,875
13 Kent
317
16,485
14 Howard
311
124,491
15 Somerset
310
13,489
16 Frederick
309
61,464
17 Wicomico
304
17,341
18 Allegany
295
20,162
19 Charles
291
9228
20 Garrett
290
39,350
21 Caroline
289
14,568
22 Carroll
289
26,873
23 Washington
277
23,282