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Observation details

ID
11348
Date Observed
8/24/2020
Submitted by
Anonymous
Observation Type
Monarchs
City
Sykesville
State
MD
Latitude
39.3774303586106
Longitude
-76.96183428249512
Comments
The area I've been monitoring has many patches of common milkweed that are not easy to get to (in overgrown areas), so I don't check them, but the 2 places I have easier access to I do. One single plant of swamp milkweed had 5 caterpillars on it that I could see. The day before there were 6. They seem to range from 3rd-5th instars. I've been monitoring this same plant for several weeks, and at one time there were sixteen caterpillars on it (along with about 10 tiny snails and a host of aphids). I moved 8 of them at that time, but left 8 on this plant. The other 3 caterpillars I observed today were in the section of common milkweed where I moved the 8 from the swamp milkweed, but I can't be sure they're the same ones. At different times I've observed between 2 and 6 others. In this same patch and on other milkweed plants I can see from the walking path of the park (but can't get to), I've observed frass and chewed leaves, but haven't spotted caterpillars. Today I observed this evidence on about 4 plants other than the ones with visible caterpillars. Close to the patch of common milkweed, but on a dead grass spike/stem I observed a chrysalis, which is 3 days old. On Aug 21 I observed the caterpillar had attached itself to the stem and was in J-shape. I returned Aug 23 and 24 and observed the chrysalis.

Eggs
0
1st Instars
0
2nd Instars
0
3rd Instars
0
4th Instars
0
5th Instars
0
Unknown Instars
8
Pupae
1
Adults
1
Milkweed Species
common milkweed; swamp milkweed
# of Mwds Checked
6