Statistics and Maps

The distribution of the refuges that contributed to the data on served with this webpage tool can be viewed in the following maps:

Distribution of refuges that responded to the survey.

Distribution of refuges that reported non-native plant species.

Distribution of refuges that reported non-indigenous animal species.

Distribution of refuges that reported plant disease.

Distribution of refuges that reported animal disease.

The five most frequently reported non-native plant species reported are listed below. Please click on the species to view reported distributions within the National Wildlife Refuge System:

Scientific Name	Common Name	TSN	Number of Reports
1. Cirsium arvense	Canada thistle	36335	74
2. Phragmites australis	Common Reed	41072	54
3. Lythrum salicaria	Purple Loosestrife	27079	41
4. Phalaris arundinacea	Reed Canary Grass	41335	36
5. Lonicera japonica	Japanese Honeysuckle	35283	35

The five most frequently reported non-indigenous species reported are listed below. Please click on the species to view reported distributions within the National Wildlife Refuge System:

Scientific Name	Common Name	TSN	Number of Reports
1. Sturnus vulgaris	European starling	179637	73
2. Sus scrofa	feral hogs	180722	57
3. Cyprinus carpio	common carp	163344	55
4. Rana catesbeiana	bullfrog	173441	39
5. Passer domesticus	house sparrow	179628	38