Mile 161 Report
Oregon Dunes NRA just north of Siltcoos River
August 26, 2025
I was pleasantly surprised to spot many juvenile plovers near the water's edge and further up the shore, sitting in scrapes. I was dismayed to find long expanses of dead jellies. As always, the osprey were feeding and then watching me from their perch on an old fallen tree.
Report Details
I was pleasantly surprised to spot many juvenile plovers near the water's edge and further up the shore, sitting in scrapes. Hopefully they are forming their winter flocks. I was dismayed to find long expanses of dead jellies. They must've been at the wrong place and at the wrong time to be pushed ashore by strong winds. As always, the osprey were feeding and then watching me from their perch on an old fallen tree.
Conditions
Temperature: 57 F. Cloud Cover: Foggy. Wind Velocity: Calm/Light. Tide Level: 5.5 feet.
Activities
Number of people: 14. Walking or running: 12. Fishing: 1.
Other Activities: motorized vehicles not allowed here.
Concerns
Apparent violations: n/a.
Notable Wildlife
30 crows were gathered when I first walked out onto beach (hopefully not hunting plovers) 18 plovers spotted in a 2 hour survey, mostly juveniles 2 osprey kept an eye on me multiple flocks of sanderlings
Beached Birds
n/a
Stranded Marine Mammals
n/a
Dead Fish or Invertebrates
Unusual concentration. Massive die off of jellies. Noted Moon Jellies, Lion's Mane Jellies, and Crystal Jellies (photos attached).
Wrackline Content
Long lines of dead jellies.
New Development
n/a
Man-made Modifications
n/a
Natural Changes
n/a
Jelly die off
Moon Jelly
Lion's Mane Jelly
Crystal Jelly
Green wrack lines
Being watched by Osprey
Sanderlings in estuary of Siltcoos River
Juvenile gulls
Snowy Plover
Shells and jellies
grenn foam
low tide
Report Images
Anna Yori
CoastWatcher
All Mile 161 Reports
Mile 161
Oregon Dunes NRA just north of Siltcoos River
We are the shoreline group of the first quarter 6th-grade Stream Team.
Siuslaw Stream Team
Mile 161
Oregon Dunes NRA just north of Siltcoos River
I was pleasantly surprised to spot many juvenile plovers near the water's edge and further up the shore, sitting in scrapes. I was dismayed to find long expanses of dead jellies. As always, the osprey were feeding and then watching me from their perch on an old fallen tree.
Anna Yori
Mile 161
Oregon Dunes NRA just north of Siltcoos River
I was happy to see less human encroachment this time into the protected, fenced-off areas designated for the endangered Snowy Plovers.
Anna Yori
Mile 161
Oregon Dunes NRA just north of Siltcoos River
I monitor this location as a USFS Snowy Plover docent.
Anna Yori
Mile 161
Oregon Dunes NRA just north of Siltcoos River
Many abiotic and biotic factors can be found along the shoreline of Siltcoos Outlet, Florence Oregon. Overall, we found many living and non living things along the wrack line of mile 161.
Siuslaw Stream Team
Mile 161
Oregon Dunes NRA just north of Siltcoos River
At least twenty-nine different species of marine mammals occur in Oregon coast waters. In conclusion, for all of the evidence and data we collected from walking on mile 161, we found the remains of living and dead creatures and many other human-created things.
Siuslaw Middle School Stream Team
Mile 161
Oregon Dunes NRA just north of Siltcoos River
We Are the shoreline group of the siuslaw middle school team team. We brought with us binoculars, Coastwatch data sheet, and a Bucket for trash. In the end we found lots of evidence of living things along with non living on the wrack line of mile 161.
Siuslaw Stream Team
Mile 161
Oregon Dunes NRA just north of Siltcoos River
What we found at mile 161 is a variety of things like birds, clams, and shells.
Siuslaw Middle School Stream Team