Invasive SpeciesHemlock wooly adelgid

Adelges tsugae
NOT FOUND by joshuaroyte
Not Yet Reviewed by Expert
Quality checked by Joshua R
Peer reviewed by
Field Notes
Excellent condition hemlock slope forest on north-facing hillside descending with a series of ravines down to a tributary of Pratt's Brook which drains to the Royal River.
Supporting Evidence
Photo of my evidence.
I looked at the underside of 120 sprays of branches (absolutely sure of hemlock ID) over a one hour period over a half mile of forest and even with a 10x hand lens did not see any signs of HWA although there were strands of white fungus on several branches out of the 120 that were initially eye catching, but ultimately looked a lot like the white fungal strands on the twigs of red spruce (also nearby).
Photo of my evidence.
No signs of HWA on the undersides of branches from the far western side of the study area
Photo of my evidence.
No signs of HWA on the far eastern edge - I have many more photos that look similar, but unfortunately no macro lens on my camera.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Adelges tsugae
Common name:
Hemlock wooly adelgid
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 43.819606 °
W -70.176242 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
Frank Knight Forest and Scammon Hemlock Slope
Trip date: 
Sun, 2018-02-11 14:30
Town or city: 
Type of investigation: 
Species Survey
Royal River


This location should really be:

40 degrees, 49 minutes, 10.58 secs
70 degrees, 10 min, 34.47 secs west

We're not sure what happened to get the wrong location.

And I'm so glad that there aren't HWA in Yarmouth!


Thanks for the update, gbh. We will get those coordinates in the right spot. For future reference, coordinates should be in the format decimal degrees. That could be why your location is off.

It's great that you didn't find HWA at your location, but the most recent data from Maine Forest shows that HWA has been located in the town of Yarmouth since around 2010

The map also shows more locations inland and up the coast over time, so keep on the lookout!

Thanks for posting,

-The VS Team