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California

Region stats

Top counties

Updated ~18 hr(s) ago.
Sort by Species Sort by Checklists
Top regions sorted by number of observed species
Rank Region Species Checklists Species
1 San Diego
278
1627
2 Los Angeles
265
1372
3 Orange
222
843
4 Riverside
206
532
5 Santa Barbara
202
418
6 Marin
193
326
7 Ventura
193
323
8 Alameda
192
505
9 Santa Clara
188
724
10 Contra Costa
187
429
11 San Bernardino
186
401
12 San Luis Obispo
186
355
13 Sonoma
183
349
14 Humboldt
182
254
15 Monterey
176
310
16 San Mateo
175
410
17 Santa Cruz
169
338
18 Sacramento
162
443
19 Kern
158
176
20 Solano
156
84
21 Yolo
156
235
22 San Francisco
153
383
23 Placer
148
176
24 Fresno
141
103
25 Napa
141
73
26 Tulare
137
92
27 Imperial
136
132
28 Merced
133
87
29 San Joaquin
133
127
30 Mendocino
127
112
31 Butte
126
131
32 Inyo
123
122
33 El Dorado
120
106
34 Shasta
114
101
35 Stanislaus
107
71
36 Tehama
106
54
37 Siskiyou
104
65
38 Plumas
101
64
39 San Benito
100
74
40 Glenn
96
26
41 Madera
96
42
42 Tuolumne
94
56
43 Mariposa
92
42
44 Del Norte
87
14
45 Lake
87
34
46 Nevada
87
114
47 Lassen
83
21
48 Calaveras
77
26
49 Colusa
66
15
50 Sutter
66
11
51 Trinity
61
31
52 Amador
58
8
53 Modoc
56
5
54 Mono
55
35
55 Kings
52
2
56 Yuba
33
5
57 Sierra
30
12
58 Alpine
11
2