This article came up in my newsfeed recently,.

It suggests  why some Monarch butterflies seem to be hanging around Texas this year – the popularity of Tropical milkweed (Asclepias curassavica). The article further goes on to explain that

” Tropical milkweed becomes a problem when planted in temperate areas where it does not die back in winter. A protozoan parasite of monarch butterflies, Ophryocystis elektroscirrha or OE for short, can travel with monarchs visiting the plants and become deposited on leaves. When caterpillars hatch and start eating the plant, they ingest the OE. High OE levels in adult monarchs have been linked to lower migration success in the eastern monarch population, as well as reductions in body mass, lifespan, mating success, and flight ability.”

Milkweeds native to the region die back after blooming, and with them, the OE. Thus each new flight of Monarchs gets to lay their eggs on new, uninfected milkweeds.

Interestingly, the article was written over three years ago…

Tropical Milkweed is a No-Grow – by the Xerxes Society

On the other hand, I have now seen and photographed Monarchs in my backyard from late March through November . I went to vote  on Tuesday, November ,2, and  observed more than a few Monarch butterflies, both in the greenbelt and in the demonstration garden. Sadly,  many of the flowers being used didn’t appear to be natives.  I also noticed that the milkweeds at the community center garden appear to be Tropical milkweed. (They have yellow flowers instead of orange flowers).

Some plants and wildlife in October: