During the month of July, we challenge you to submit reports to iMap for our selected focal species to help fill data gaps and compete to win!


Learn about the selected species by joining our webinar, or viewing the info below.


Throughout July - go outside and check for the selected species you're most interested in.


Report back to iMap - whether you find it or not!

The observers with the most records (including not-detected reports!) for each species will win a prize! You might even help win a trophy for your PRISM!

Wednesday June 29th, 1pm

Learn about the selected species from the experts!

This years species are Beech Leaf Disease, jumping worm, tree-of-heaven, and three aquatic plants: water chestnut, frogbit, and watercress.

7th Annual Invasive Species Mapping Challenge

Welcome to the


Meet the species! 

Click the icons below each species picture for the following resources (watercress coming soon)

Quick video on identifying the species

Map of the currently known distribution

A link to more info on the species

Water Chestnut
Trapa natans
Jumping Worm
Amynthas-Metaphire spp.
European Frog-bit
Hydrocharis morsus-ranae
Ailanthus Altissima
Beech Leaf Disease
Litylenchus crenatae mccanii

Search for these species and report Presence and Not-detected records to iMapInvasives! View our quick setup playlist.


*** The challenge includes Not-Detected Records! ***

Searching for these species but can't find them in your area? Make sure you are checking the correct habitat, and record in iMap that you searched for the species but did not find it (select "not-detected" in the mobile app). Be sure to enter the number of minutes you spent looking around in "time searched"!

Water Chestnut

Slow-moving or stagnant water (lakes, ponds, rivers, and streams)

Jumping Worm

Found on the soil surface and leaf litter - Lawns, gardens, forest understories, etc.

European Frog-bit

Slow-moving or stagnant water (lakes, ponds, rivers, and streams)


Disturbed areas - roadsides, forest edges and openings, urban areas, parking lots, etc.

Beech Leaf Disease

To check for BLD, you have to find a Beech tree, common in many NY forests