The Integrated Taxonomic Information System is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagency group within the US federal government, involving several US federal agencies, and has now become an international body, with Canadian and Mexican government agencies participating. The database draws from a large community of taxonomic experts. Primary content staff are housed at the Smithsonian National Museum of Natural History and IT services are provided by a US Geological Survey facility in Denver. The primary focus of ITIS is North American species, but many biological groups exist worldwide and ITIS collaborates with other agencies to increase its global coverage. More information...
Multilingual Wikipedia
In June 2020 the website itis.gov was on the 1,609th place in the ranking of the most reliable and popular sources in multilingual Wikipedia from readers' point of view (PR-score). If we consider only frequency of appearance of this source in references of Wikipedia articles (F-score), this website was on the 165th place in June 2020. From Wikipedians' point of view, "itis.gov" is the 430th most reliable source in different language versions of Wikipedia (AR-score).
The website is placed before ynetnews.com and after cnrs.fr in multilingual PR ranking of the most reliable sources in Wikipedia.
PR-score:

1,609
th place
22,623,717
-4,096,847
AR-score:

430
th place
10,353,524
+22,763
F-score:

165
th place
83,761
+169
English Wikipedia (en)
PR-score:

1,694
th place
10,942,563
-941,205
AR-score:

418
th place
5,006,314
+27,503
F-score:

53
rd place
57,485
+58
Finnish Wikipedia (fi)
PR-score:

49
th place
1,747,546
-706,981
Japanese Wikipedia (ja)
PR-score:

1,219
th place
1,505,120
-160,183
AR-score:

2,243
rd place
62,174
-634
F-score:

2,671
st place
190
-5
Spanish Wikipedia (es)
PR-score:

1,662
nd place
1,453,096
-99,506
AR-score:

1,045
th place
288,231
+2,352
F-score:

513
th place
1,421
+73
Russian Wikipedia (ru)
PR-score:

2,320
th place
878,318
-152,929
AR-score:

2,186
th place
92,837
+191
F-score:

2,439
th place
308
+1
Thai Wikipedia (th)
PR-score:

124
th place
641,696
-68,923
AR-score:

59
th place
245,620
+183
F-score:

69
th place
822
0
Portuguese Wikipedia (pt)
PR-score:

1,174
th place
638,320
+14,980
AR-score:

878
th place
134,307
+575
F-score:

1,030
th place
450
+41
Swedish Wikipedia (sv)
PR-score:

243
rd place
596,202
-209,595
Polish Wikipedia (pl)
PR-score:

1,087
th place
518,921
-314,622
AR-score:

1,127
th place
89,282
+58
F-score:

1,514
th place
276
0
Arabic Wikipedia (ar)
PR-score:

446
th place
507,791
-8,144
AR-score:

192
nd place
408,216
+1,375
F-score:

196
th place
1,464
+6
Dutch Wikipedia (nl)
PR-score:

530
th place
484,437
-118,970
Bulgarian Wikipedia (bg)
PR-score:

247
th place
273,078
-89,078
AR-score:

57
th place
296,517
+1,146
Hungarian Wikipedia (hu)
PR-score:

482
nd place
246,720
-136,166
AR-score:

76
th place
374,584
-6,491
F-score:

86
th place
1,323
-20
Czech Wikipedia (cs)
PR-score:

743
rd place
240,032
-123,231
AR-score:

856
th place
36,666
+60
F-score:

1,359
th place
96
0
Indonesian Wikipedia (id)
PR-score:

566
th place
190,388
-22,644
AR-score:

233
rd place
77,360
+88
F-score:

181
st place
779
+1
Italian Wikipedia (it)
PR-score:

3,618
th place
189,031
-128,463
AR-score:

2,583
rd place
64,045
-2,062
F-score:

2,084
th place
204
-1
French Wikipedia (fr)
PR-score:

6,419
th place
182,531
-56,055
AR-score:

4,027
th place
62,026
+676
F-score:

4,030
th place
186
0
Chinese Wikipedia (zh)
PR-score:

5,092
nd place
177,237
-46,534
AR-score:

3,209
th place
23,286
+661
F-score:

3,419
th place
97
+1
German Wikipedia (de)
PR-score:

9,578
th place
165,927
-38,273
AR-score:

7,756
th place
34,450
-44
F-score:

7,645
th place
71
+1
Vietnamese Wikipedia (vi)
PR-score:

916
th place
148,013
-25,477
AR-score:

124
th place
233,877
+367
F-score:

215
th place
829
+3
Lithuanian Wikipedia (lt)
PR-score:

194
th place
76,058
-120,897
AR-score:

211
th place
27,074
0
F-score:

415
th place
40
0
Romanian Wikipedia (ro)
PR-score:

867
th place
63,097
-127,818
AR-score:

1,013
th place
12,410
+10
F-score:

1,864
th place
40
0
Serbian Wikipedia (sr)
PR-score:

590
th place
62,205
-70,100
AR-score:

323
rd place
44,320
+964
F-score:

391
st place
195
+1
Catalan Wikipedia (ca)
PR-score:

546
th place
60,373
-64,394
AR-score:

118
th place
295,891
-7,243
F-score:

173
rd place
994
-17
Galician Wikipedia (gl)
PR-score:

86
th place
55,551
-3,279
Ukrainian Wikipedia (uk)
PR-score:

2,609
th place
45,324
-44,302
AR-score:

1,421
st place
24,202
+88
F-score:

2,054
th place
103
0
Greek Wikipedia (el)
PR-score:

1,353
rd place
42,298
-14,105
AR-score:

1,581
st place
7,785
+41
F-score:

668
th place
124
+1
Croatian Wikipedia (hr)
PR-score:

1,016
th place
35,440
-33,837
AR-score:

822
nd place
10,242
+34
F-score:

760
th place
52
0
Korean Wikipedia (ko)
PR-score:

2,879
th place
34,470
-4,019
AR-score:

1,407
th place
15,324
+230
F-score:

1,233
rd place
64
0
Persian Wikipedia (fa)
PR-score:

3,512
th place
29,663
-831
AR-score:

2,768
th place
9,318
+173
F-score:

1,854
th place
48
0
Bengali Wikipedia (bn)
PR-score:

328
th place
24,240
+757
AR-score:

449
th place
9,746
+541
F-score:

2,297
th place
16
+1
Simple English Wikipedia (simple)
PR-score:

1,217
th place
23,302
-14,082
AR-score:

867
th place
14,327
+45
F-score:

561
st place
75
0
Turkish Wikipedia (tr)
PR-score:

6,091
st place
20,356
-5,943
AR-score:

4,384
th place
7,317
+2
F-score:

3,746
th place
23
0
Slovenian Wikipedia (sl)
PR-score:

474
th place
19,974
-42,413
AR-score:

829
th place
4,124
0
F-score:

1,005
th place
22
0
Danish Wikipedia (da)
PR-score:

2,176
th place
19,768
-1,180
AR-score:

1,504
th place
9,856
0
F-score:

2,692
nd place
16
0
Estonian Wikipedia (et)
PR-score:

528
th place
19,405
-4,631
AR-score:

446
th place
12,751
+34
Norwegian Wikipedia (no)
PR-score:

2,305
th place
18,343
+1,860
AR-score:

1,488
th place
19,981
+133
F-score:

1,947
th place
48
0
Armenian Wikipedia (hy)
PR-score:

536
th place
14,428
-13,191
AR-score:

653
rd place
9,008
+1
F-score:

2,830
th place
25
0
Hebrew Wikipedia (he)
PR-score:

3,829
th place
14,054
-2,451
AR-score:

16,843
rd place
969
+31
F-score:

6,263
rd place
7
0
Basque Wikipedia (eu)
PR-score:

352
nd place
12,487
-8,764
AR-score:

429
th place
10,435
+14
F-score:

426
th place
43
0
Slovak Wikipedia (sk)
PR-score:

2,046
th place
12,457
-5,155
AR-score:

1,710
th place
3,952
0
F-score:

1,516
th place
19
0
Latvian Wikipedia (lv)
PR-score:

702
nd place
11,480
-31,166
AR-score:

756
th place
5,900
+104
Malay Wikipedia (ms)
PR-score:

1,393
rd place
10,564
+389
AR-score:

1,159
th place
3,801
+8
F-score:

1,083
rd place
41
+1
Asturian Wikipedia (ast)
PR-score:

415
th place
10,390
+513
AR-score:

127
th place
31,216
+128
Latin Wikipedia (la)
PR-score:

137
th place
9,710
-1,590
AR-score:

82
nd place
21,978
+104
F-score:

117
th place
46
+1
Tamil Wikipedia (ta)
PR-score:

658
th place
9,383
+905
AR-score:

638
th place
6,224
+17
F-score:

1,398
th place
21
0
Icelandic Wikipedia (is)
PR-score:

127
th place
9,351
-9,825
AR-score:

199
th place
4,754
0
F-score:

105
th place
36
0
Hindi Wikipedia (hi)
PR-score:

1,344
th place
7,843
-1,852
AR-score:

1,411
th place
2,988
+218
F-score:

2,329
th place
10
0
Esperanto Wikipedia (eo)
PR-score:

260
th place
7,382
+67
F-score:

153
rd place
99
0
Afrikaans Wikipedia (af)
PR-score:

462
nd place
7,055
-2,499
AR-score:

134
th place
15,550
+221
F-score:

432
nd place
34
0
Silesian Wikipedia (szl)
PR-score:

30
th place
6,990
-1,718
Malayalam Wikipedia (ml)
PR-score:

551
st place
6,609
-2,884
F-score:

607
th place
37
0
Scots Wikipedia (sco)
PR-score:

398
th place
5,922
-574
AR-score:

509
th place
2,475
0
F-score:

827
th place
15
0
Albanian Wikipedia (sq)
PR-score:

677
th place
5,831
-12,294
AR-score:

749
th place
2,349
+24
F-score:

2,276
th place
5
+1
Nepali Wikipedia (ne)
PR-score:

186
th place
5,646
+230
AR-score:

98
th place
7,499
0
F-score:

471
st place
12
0
Kazakh Wikipedia (kk)
PR-score:

502
nd place
5,316
-1,500
AR-score:

178
th place
4,666
0
F-score:

866
th place
6
0
Serbo-Croatian Wikipedia (sh)
PR-score:

1,412
th place
4,565
-3,294
AR-score:

1,312
th place
2,142
0
F-score:

2,169
th place
12
0
Guarani Wikipedia (gn)
PR-score:

63
rd place
4,500
+350
Santali Wikipedia (sat)
PR-score:

75
th place
3,185
-1,186
AR-score:

78
th place
752
+14
F-score:

253
rd place
6
0
Sanskrit Wikipedia (sa)
PR-score:

47
th place
3,100
-400
Assamese Wikipedia (as)
PR-score:

216
th place
3,092
-1,005
AR-score:

278
th place
1,181
+146
F-score:

521
st place
9
0
Sakha Wikipedia (sah)
PR-score:

103
rd place
3,000
-1,000
F-score:

691
st place
1
0
Kannada Wikipedia (kn)
PR-score:

462
nd place
2,936
-747
AR-score:

266
th place
3,504
0
F-score:

1,253
rd place
10
0
South Azerbaijani Wikipedia (azb)
PR-score:

336
th place
2,933
-650
AR-score:

1,141
st place
550
0
F-score:

3,716
th place
2
0
Georgian Wikipedia (ka)
PR-score:

2,491
st place
2,751
-945
AR-score:

1,141
st place
2,734
0
F-score:

2,420
th place
8
0
Macedonian Wikipedia (mk)
PR-score:

1,681
st place
2,589
-3,552
AR-score:

1,939
th place
1,467
+19
F-score:

918
th place
27
0
Belarusian Wikipedia (be)
PR-score:

997
th place
2,544
+519
AR-score:

1,611
th place
1,633
+32
F-score:

558
th place
45
+2
Manx Wikipedia (gv)
PR-score:

90
th place
2,522
+311
Bosnian Wikipedia (bs)
PR-score:

2,476
th place
2,410
-2,483
AR-score:

1,004
th place
3,275
+123
F-score:

869
th place
17
+1
Scottish Gaelic Wikipedia (gd)
PR-score:

253
rd place
2,350
+317
F-score:

535
th place
3
0
Azerbaijani Wikipedia (az)
PR-score:

2,725
th place
2,282
-1,202
AR-score:

4,998
th place
648
0
F-score:

6,040
th place
4
0
Welsh Wikipedia (cy)
PR-score:

730
th place
1,980
-990
AR-score:

252
nd place
6,441
0
F-score:

640
th place
11
0
Burmese Wikipedia (my)
PR-score:

551
st place
1,958
+317
F-score:

1,133
rd place
4
0
Telugu Wikipedia (te)
PR-score:

1,021
st place
1,742
-732
AR-score:

1,228
th place
1,256
0
F-score:

2,068
th place
5
0
Punjabi Wikipedia (pa)
PR-score:

675
th place
1,697
+79
F-score:

1,300
th place
7
0
Tagalog Wikipedia (tl)
PR-score:

1,269
th place
1,492
-583
AR-score:

638
th place
2,542
0
F-score:

1,206
th place
9
0
Aragonese Wikipedia (an)
PR-score:

362
nd place
1,440
-1,040
AR-score:

289
th place
2,860
0
F-score:

655
th place
3
0
Ilokano Wikipedia (ilo)
PR-score:

413
th place
1,352
+21
Kapampangan Wikipedia (pam)
PR-score:

181
st place
1,330
-150
Lao Wikipedia (lo)
PR-score:

164
th place
1,058
-117
AR-score:

324
th place
116
0
Cantonese Wikipedia (zh-yue)
PR-score:

2,457
th place
950
+150
AR-score:

3,653
rd place
250
0
F-score:

7,651
st place
1
0
Norwegian (Nynorsk) Wikipedia (nn)
PR-score:

1,769
th place
872
-304
AR-score:

2,753
rd place
959
0
F-score:

1,171
st place
13
0
Urdu Wikipedia (ur)
PR-score:

2,159
th place
857
+200
AR-score:

3,830
th place
478
0
F-score:

5,824
th place
2
0
Sindhi Wikipedia (sd)
PR-score:

345
th place
850
-373
AR-score:

152
nd place
851
0
F-score:

308
th place
5
0
Kurdish Wikipedia (ku)
PR-score:

484
th place
842
-307
AR-score:

171
st place
3,011
0
F-score:

144
th place
10
0
Khmer Wikipedia (km)
PR-score:

524
th place
833
-533
F-score:

1,206
th place
1
0
Bhojpuri Wikipedia (bh)
PR-score:

696
th place
733
-267
AR-score:

1,219
th place
66
0
Cornish Wikipedia (kw)
PR-score:

54
th place
700
+500
AR-score:

53
rd place
300
0
F-score:

106
th place
1
0
Lower Sorbian Wikipedia (dsb)
PR-score:

101
st place
600
-400
Low Saxon Wikipedia (nds)
PR-score:

885
th place
600
+550
AR-score:

2,066
th place
150
0
F-score:

4,486
th place
1
0
Newar Wikipedia (new)
PR-score:

312
th place
586
-307
Irish Wikipedia (ga)
PR-score:

694
th place
539
+371
AR-score:

1,028
th place
479
0
F-score:

572
nd place
4
0
Javanese Wikipedia (jv)
PR-score:

1,579
th place
533
+56
AR-score:

816
th place
1,729
0
F-score:

1,262
nd place
10
0
Zazaki Wikipedia (diq)
PR-score:

306
th place
500
+200
AR-score:

461
st place
200
0
F-score:

645
th place
1
0
Extremaduran Wikipedia (ext)
PR-score:

163
rd place
475
-25
Min Nan Wikipedia (zh-min-nan)
PR-score:

439
th place
400
-50
F-score:

756
th place
1
0
Ingush Wikipedia (inh)
PR-score:

176
th place
400
+100
AR-score:

132
nd place
100
0
F-score:

152
nd place
1
0
Upper Sorbian Wikipedia (hsb)
PR-score:

147
th place
400
-800
Belarusian (Taraškievica) Wikipedia (be-x-old)
PR-score:

2,594
th place
335
-503
AR-score:

2,044
th place
858
0
F-score:

2,526
th place
3
0
Sundanese Wikipedia (su)
PR-score:

1,491
st place
331
-267
AR-score:

819
th place
576
0
F-score:

381
st place
18
0
Oriya Wikipedia (or)
PR-score:

1,313
th place
283
-320
AR-score:

653
rd place
583
0
F-score:

1,358
th place
3
0
Hill Mari Wikipedia (mrj)
PR-score:

34
th place
266
-200
AR-score:

65
th place
133
0
Bashkir Wikipedia (ba)
PR-score:

2,966
th place
250
-200
F-score:

2,949
th place
3
0
Maithili Wikipedia (mai)
PR-score:

933
rd place
220
-140
AR-score:

1,147
th place
90
0
F-score:

892
nd place
2
0
Mongolian Wikipedia (mn)
PR-score:

2,692
nd place
200
+100
AR-score:

485
th place
1,700
0
F-score:

2,772
nd place
1
0
Gujarati Wikipedia (gu)
PR-score:

2,314
th place
180
+54
AR-score:

7,419
th place
20
0
F-score:

9,140
th place
1
0
West Frisian Wikipedia (fy)
PR-score:

1,253
rd place
168
-22
AR-score:

2,951
st place
52
0
F-score:

932
nd place
2
0
Rusyn Wikipedia (rue)
PR-score:

370
th place
166
-167
Breton Wikipedia (br)
PR-score:

1,681
st place
150
0
AR-score:

694
th place
1,150
0
F-score:

1,127
th place
2
0
Tatar Wikipedia (tt)
PR-score:

3,436
th place
100
-100
AR-score:

712
th place
1,000
0
F-score:

2,006
th place
2
0
Kirghiz Wikipedia (ky)
PR-score:

807
th place
100
0
AR-score:

365
th place
300
0
F-score:

917
th place
1
0
Navajo Wikipedia (nv)
PR-score:

106
th place
100
-33
Occitan Wikipedia (oc)
PR-score:

2,804
th place
100
0
AR-score:

3,906
th place
50
0
F-score:

5,668
th place
1
0
Central Bicolano Wikipedia (bcl)
PR-score:

1,549
th place
100
+12
AR-score:

2,271
st place
22
0
F-score:

3,294
th place
1
0
West Flemish Wikipedia (vls)
PR-score:

360
th place
84
+5
Yoruba Wikipedia (yo)
PR-score:

2,003
rd place
64
0
AR-score:

2,157
th place
64
0
F-score:

983
rd place
2
0
Erzya Wikipedia (myv)
PR-score:

833
rd place
50
-800
AR-score:

398
th place
100
0
F-score:

408
th place
2
0
Quechua Wikipedia (qu)
PR-score:

783
rd place
50
0
AR-score:

563
rd place
150
0
F-score:

628
th place
1
0
Luxembourgish Wikipedia (lb)
PR-score:

3,256
th place
40
-40
AR-score:

3,053
rd place
120
0
F-score:

1,618
th place
2
0
Acehnese Wikipedia (ace)
PR-score:

438
th place
33
-167
AR-score:

427
th place
33
0
F-score:

424
th place
1
0
Sinhalese Wikipedia (si)
PR-score:

4,638
th place
28
-11
AR-score:

3,847
th place
25
0
F-score:

2,208
th place
2
0
Haitian Wikipedia (ht)
PR-score:

1,771
st place
25
-25
AR-score:

1,689
th place
20
0
F-score:

1,283
rd place
1
0
Sorani Wikipedia (ckb)
PR-score:

4,294
th place
25
0
AR-score:

2,304
th place
150
+25
F-score:

3,015
th place
1
0
Western Punjabi Wikipedia (pnb)
PR-score:

6,052
nd place
14
-43
AR-score:

3,920
th place
28
0
F-score:

5,528
th place
1
0
Marathi Wikipedia (mr)
PR-score:

6,509
th place
4
0
AR-score:

6,335
th place
14
0
F-score:

6,490
th place
1
0