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United States

Top states or provinces

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 California
715
4,350,482
2 Texas
684
2,714,333
3 Florida
577
2,279,207
4 Arizona
570
1,422,967
5 New Mexico
565
557,764
6 Alaska
560
369,202
7 Oregon
556
1,497,425
8 New York
519
2,868,123
9 Colorado
516
1,389,869
10 Massachusetts
516
1,574,368
11 Washington
516
1,626,534
12 Virginia
494
1,337,255
13 North Carolina
490
1,022,452
14 Nevada
485
211,847
15 Louisiana
476
334,613
16 New Jersey
473
1,140,614
17 Utah
471
475,472
18 Oklahoma
464
228,825
19 Maryland
461
1,238,495
20 Kansas
460
387,014
21 Wisconsin
457
1,401,783
22 Alabama
455
303,171
23 Maine
454
725,456
24 South Carolina
454
544,430
25 Pennsylvania
453
2,053,460
26 Connecticut
450
717,658
27 Illinois
446
1,381,331
28 Michigan
442
1,555,923
29 Nebraska
442
215,380
30 Ohio
442
1,553,957
31 Wyoming
442
186,368
32 Georgia
440
817,940
33 Tennessee
440
605,348
34 Idaho
437
369,113
35 Montana
434
412,085
36 Minnesota
431
956,413
37 Iowa
429
236,628
38 Delaware
426
235,411
39 Arkansas
423
225,384
40 New Hampshire
422
376,374
41 Indiana
421
657,492
42 Missouri
418
563,418
43 South Dakota
412
115,146
44 Mississippi
410
162,512
45 Rhode Island
410
151,265
46 North Dakota
407
136,343
47 Kentucky
394
270,031
48 Vermont
391
575,100
49 West Virginia
366
194,458
50 District of Columbia
323
110,504
51 Hawaii
287
193,764