Table 2. Open in new tab Count and...

	All	IIS
Plant	491	41.2	317	60.6
Animal	701	58.8	206	39.4
Vertebrate	444	37.2	72	13.8
Fish	238	20.0	31	5.9
Amphibian	14	1.2	4	0.8
Reptile	40	3.4	8	1.5
Bird	62	5.2	16	3.1
Mammal	90	7.6	13	2.5
Invertebrate	257	21.6	134	25.6
Mollusk	22	1.8	13	2.5
Arthropod	231	19.4	119	22.8
Insect	180	15.1	101	19.3
Crustacean	23	1.9	9	1.7
All	1192	100.0	523	100.0

	All	IIS
Plant	491	41.2	317	60.6
Animal	701	58.8	206	39.4
Vertebrate	444	37.2	72	13.8
Fish	238	20.0	31	5.9
Amphibian	14	1.2	4	0.8
Reptile	40	3.4	8	1.5
Bird	62	5.2	16	3.1
Mammal	90	7.6	13	2.5
Invertebrate	257	21.6	134	25.6
Mollusk	22	1.8	13	2.5
Arthropod	231	19.4	119	22.8
Insect	180	15.1	101	19.3
Crustacean	23	1.9	9	1.7
All	1192	100.0	523	100.0

Table 2.

Count and percentage of all species and of the invasive and introduced species in the policy database, divided by taxonomic groups.

	All		IIS
Taxon	Count	Percentage	Count	Percentage
Plant	491	41.2	317	60.6
Animal	701	58.8	206	39.4
Vertebrate	444	37.2	72	13.8
Fish	238	20.0	31	5.9
Amphibian	14	1.2	4	0.8
Reptile	40	3.4	8	1.5
Bird	62	5.2	16	3.1
Mammal	90	7.6	13	2.5
Invertebrate	257	21.6	134	25.6
Mollusk	22	1.8	13	2.5
Arthropod	231	19.4	119	22.8
Insect	180	15.1	101	19.3
Crustacean	23	1.9	9	1.7
All	1192	100.0	523	100.0

	All		IIS
Taxon	Count	Percentage	Count	Percentage
Plant	491	41.2	317	60.6
Animal	701	58.8	206	39.4
Vertebrate	444	37.2	72	13.8
Fish	238	20.0	31	5.9
Amphibian	14	1.2	4	0.8
Reptile	40	3.4	8	1.5
Bird	62	5.2	16	3.1
Mammal	90	7.6	13	2.5
Invertebrate	257	21.6	134	25.6
Mollusk	22	1.8	13	2.5
Arthropod	231	19.4	119	22.8
Insect	180	15.1	101	19.3
Crustacean	23	1.9	9	1.7
All	1192	100.0	523	100.0

Note: We classified a species as introduced or invasive if it was listed in either the United States Register of Introduced and Invasive Species (US-RIIS; Simpson et al. 2018, 2022) or the USGS Nonindigenous Aquatic Species database (US Geological Survey 2023). Abbreviation: IIS, introduced and invasive species.

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