Invasive SpeciesCommon periwinkle

Littorina littorea
NOT FOUND by York7Earth
ID Confirmed
Quality checked by Raizel and Suzanna and Ms MacLean
Peer reviewed by Fiona and Sascha
Field Notes
When York 7 went to the Scarborough salt marsh on April 29th we did a lot. We had quadrats to collect data within the one meter square area. To explain, we measured plants in the quadrat and took notice of any life that was in it. We also collected information outside of the quadrat when we took time to observe the land and see if there were any animals around. All this can help us understand what is happening to the marsh. To illustrate, most of what was in our quadrat was either dead or just sprouting. This is most likely caused by winter going and spring beginning. As for the animals most of them were probably hibernating. This can help us understand the marsh in further years. Secondly we took "marsh parfaits" (Winogradsky columns) to observe and see the soil closer. We also had a station where we found mystery rocks and answered the questions inside which were about the history of the marsh and eastern trail. In conclusion we did many things when we visited the salt marsh.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The only shell we found was this little white one and it did not match the species card for common periwinkle.
We moved all the grass aside and looked under it all over the quadrat.
The shell we did find was shaped more like the SHELL A diagram on the species card. WE don't know the name of the shell we found.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Littorina littorea
Common name:
Common periwinkle
Sampling method: 
Just looking around
Quadrat (randomized- placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.562816 °
W -70.366927 °
Observation Site Information
A photo of our study site.
Coastal - Saltmarsh
Trip Information
Eastern Trail Scarborough Marsh
Trip date: 
Tue, 2014-04-29 09:31
Town or city: 
Type of investigation: 
Species and Habitat Survey
Time of low tide: 
Tue, 2014-04-29 07:00
Habitat Observations
Species diversity: 
7 different species
Evidence of vectors: 
Paved road
Dirt road
Walking trail
Recent disturbance
Water temperature: 
Dissolved oxygen: 


Awesome sketch!! and I agree. I don't think that's the common perwinkle. I wonder what it is.

It sounds like you had a great day at the marsh. Keep up the great citizen science work :)