The list of introduced species provided in this section focuses on organisms that are reported in the Northeast (from Maine to New York City), although many extend their range both to the north and south.
Not all of the introduced plants, animals, and small organisms that are reported in the northeast are identified in this list. We highlight plants and animals that:
can be seen with the naked eye or a magnifying glass in the field,
are considered a nuisance or invasive species
can be readily identified compared to native species
and/or are widespread
We have identified the probable and potential pathways for each species taking into account the eggs, larval, juvenile and adult life history characteristics. Thus, this list is by no means complete, even for species found in estuarine and marine environments. Brackish water plants and animals are not included.