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Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Larimer
427
149,104
2 Pueblo
422
30,818
3 Boulder
417
157,243
4 El Paso
413
94,792
5 Jefferson
403
169,998
6 Weld
396
56,198
7 Bent
390
9271
8 Douglas
389
67,228
9 Adams
377
47,465
10 Arapahoe
368
83,596
11 Kiowa
364
6898
12 Prowers
364
18,990
13 Mesa
352
42,969
14 Otero
351
7122
15 Baca
346
6132
16 Fremont
346
18,322
17 Logan
346
9865
18 Washington
345
6136
19 Yuma
340
8339
20 Morgan
336
10,073
21 La Plata
334
14,321
22 Crowley
327
3333
23 Denver
326
58,122
24 Lincoln
321
5958
25 Huerfano
318
4296
26 Las Animas
316
5075
27 Sedgwick
315
2832
28 Kit Carson
308
4108
29 Delta
307
8265
30 Montezuma
307
13,233
31 Custer
304
3298
32 Montrose
302
17,835
33 Chaffee
298
11,659
34 Park
298
16,798
35 Moffat
294
7313
36 Garfield
292
8976
37 Alamosa
291
9161
38 Routt
287
11,081
39 Broomfield
280
13,650
40 Gunnison
280
12,974
41 Archuleta
279
9840
42 Eagle
276
11,252
43 Jackson
276
13,303
44 Phillips
276
3668
45 Teller
276
12,447
46 San Miguel
273
6684
47 Ouray
272
7469
48 Elbert
269
6668
49 Rio Blanco
264
2798
50 Rio Grande
264
4504
51 Cheyenne
262
2887
52 Saguache
262
4541
53 Summit
260
14,586
54 Grand
259
9971
55 Costilla
250
1402
56 Dolores
247
1871
57 Conejos
244
1935
58 Pitkin
230
10,786
59 Clear Creek
222
10,569
60 Hinsdale
214
2247
61 Lake
213
2485
62 Mineral
205
1467
63 Gilpin
190
3964
64 San Juan
188
1699