Postcard from Cape Monarch
Crossing the Delaware Bay on my way to New Jersey yesterday, migrating monarchs were flying past the ferry, and I was lucky enough to land at the same time as a cloud of these guys descended upon the dunes of Cape May Point.

Monarchs are on their migration southward right now, and in need of nectar from plants like goldenrod. Photo: Stacy Small-Lorenz
However, migrating adults get energy from blooming fall flowers, and especially important is the abundant nectar of goldenrod along their southward journey.
An Essential Fall Nectar Plant for Monarchs
While in Cape May, monarchs especially love seaside goldenrod which thrives in sandy places. The town of Cape May Point has planted plenty of goldenrod on their dunes.

The dunes at Cape May Point, New Jersey in autumn with seaside goldenrod blooming. Photo: Stacy Small-Lorenz.

Monarchs on seaside goldenrod in Cape May Point, New Jersey. There are six, can you find them all? Photo: Stacy Small-Lorenz
He showed me how they tag, determine the sex, and evaluate the condition of each monarch they net. This includes giving its abdomen a gentle massage with the fingertips to assess the fat score.

Monarch tagging. You can tell this one is a male by its scent gland, a black dot on the hind wing. Photo: Stacy Small-Lorenz.
I learned that monarchs have been recaptured in Mexico that were tagged in Cape May. Amazing!
Hopefully, all that sweet goldenrod nectar will fatten these butterflies up enough to fuel them safely on their long southward journey.
And no, goldenrod doesn’t cause hay fever! That’s the less showy ragweed which bears pollen at the same time.
So all of you butterfly heroes out there, planting goldenrod should be the next thing to add to your butterfly hero checklist! Please retweet the tweet below to help spread the word!
#monarchs on their southward migration! Plant fall-blooming nectar plants like goldenrod. http://t.co/uNNXuGpYeP pic.twitter.com/tIIsIC1NIW
— Wildlife Action (@wildlifeaction) October 11, 2015