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United States

Top states or provinces

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Texas
546
283,198
2 California
538
448,098
3 Florida
446
243,616
4 Arizona
442
166,325
5 New Mexico
432
63,256
6 Colorado
410
174,620
7 Oregon
390
175,594
8 Kansas
381
45,475
9 North Carolina
381
154,754
10 Oklahoma
378
27,760
11 New York
377
335,104
12 Massachusetts
375
185,328
13 Washington
375
208,098
14 New Jersey
367
125,208
15 Nevada
364
21,695
16 Virginia
364
162,969
17 Louisiana
363
35,274
18 Utah
362
55,959
19 Nebraska
357
26,489
20 Alaska
356
44,499
21 Maryland
349
139,645
22 Montana
344
49,097
23 Alabama
342
36,723
24 Georgia
342
88,366
25 Wisconsin
341
151,421
26 Minnesota
339
127,974
27 South Dakota
338
13,273
28 Ohio
336
203,669
29 Illinois
334
165,919
30 Maine
333
100,740
31 Mississippi
333
17,474
32 Pennsylvania
333
240,266
33 Tennessee
331
78,048
34 Michigan
330
198,621
35 Missouri
330
62,848
36 South Carolina
329
66,947
37 Indiana
328
88,917
38 Connecticut
325
72,447
39 Wyoming
323
25,528
40 Arkansas
322
26,710
41 Delaware
322
26,611
42 North Dakota
321
21,926
43 Idaho
320
48,690
44 Iowa
319
31,297
45 Rhode Island
318
18,870
46 New Hampshire
313
54,285
47 Kentucky
295
36,470
48 West Virginia
274
21,794
49 Vermont
269
68,700
50 District of Columbia
237
13,666
51 Hawaii
170
16,661