Monarch caterpillars are eating all the milkweed!

Did you know?

There are three sites in San Diego County where monarch butterflies overwinter, one in Grape Street Park in Balboa Park,  one in Presidio Park in Old Town San Diego State Historic Park, and one at the University of California San Diego Coast Site on Azul Street.

Surprisingly I have not been to any of them. Next winter….

Meanwhile, though, over at the Botanic Building in Balboa Park, there are two huge milkweed bushes at the entrances to the building. Monarchs, of course, love milkweed. On March 24, the bushes were full of monarch caterpillars, six just in this one picture:

Monarch butterfly caterpillars

By now those caterpillars probably have eaten every leaf on the plants and are nice and comfortable in their chrysalises. Here’s a fresh chrysalis from last year:

Chrysalis of a Monarch butterfly

As the chrysalises age, they turn brown.

Monarch caterpillar chrysalis, September 2011, San Diego

By Memorial Day the bushes will be full of monarch butterflies, flittering all about. Another picture from last year:

Monarch butterfly

Now, let’s learn how to tell the difference between a male monarch and a female.

Male monarchs have a black spot near the rear of each wing. Females don’t.

Here are two pictures to illustrate. The first picture is a male, the second a female. See the black spots on the male’s wings?

Monarch

Monarch

Thanks for stopping by! See you next time!

This post approved by
This post approved by Zoey the Cool Cat

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2 thoughts on “Monarch caterpillars are eating all the milkweed!

  1. jolynnpowers

    we must get them just a few weeks later.. they appear here around the second week in June… love the photos and thanks for stopping by to visit the blog. It has been a struggle to read and write for a few months but some thing keeps calling me back!!! Jolynn

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