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Top counties

Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 Larimer
432
203,708
2 Boulder
420
201,400
3 Pueblo
419
39,241
4 El Paso
418
122,582
5 Jefferson
409
213,884
6 Bent
395
11,074
7 Weld
394
67,700
8 Douglas
389
81,846
9 Adams
378
61,648
10 Arapahoe
373
108,693
11 Prowers
373
21,310
12 Kiowa
368
8127
13 Baca
363
7554
14 Mesa
359
56,093
15 Otero
353
8286
16 Fremont
349
22,484
17 Washington
349
7388
18 Logan
347
11,586
19 Yuma
345
9763
20 Morgan
339
12,315
21 La Plata
337
20,242
22 Crowley
333
4031
23 Denver
330
75,949
24 Lincoln
330
7197
25 Las Animas
324
6305
26 Montezuma
321
18,838
27 Huerfano
320
5191
28 Sedgwick
320
3377
29 Kit Carson
311
5093
30 Delta
310
10,217
31 Chaffee
305
16,163
32 Custer
305
4606
33 Montrose
304
23,107
34 Park
303
21,563
35 Alamosa
300
10,560
36 Moffat
299
9189
37 Garfield
297
11,778
38 Routt
293
14,215
39 Broomfield
287
17,332
40 Teller
287
16,246
41 Gunnison
286
17,029
42 Jackson
284
16,189
43 Phillips
284
4095
44 Eagle
283
15,690
45 Archuleta
280
12,071
46 Ouray
278
11,337
47 Cheyenne
276
3520
48 San Miguel
274
8627
49 Elbert
273
8327
50 Rio Grande
271
6134
51 Rio Blanco
270
3795
52 Saguache
270
5704
53 Summit
268
19,263
54 Grand
266
14,057
55 Costilla
263
1823
56 Conejos
254
2572
57 Dolores
248
2502
58 Pitkin
238
14,945
59 Clear Creek
227
14,087
60 Hinsdale
219
2899
61 Lake
219
3577
62 Mineral
210
2140
63 Gilpin
200
5851
64 San Juan
190
2263