Welcome to My Caterpillar Ranch

I found this Black Swallowtail Butterfly caterpillar crawling in the middle of my lawn and gave it a ride to this fennel plant, where it attached itself with a sling to a fennel stalk. Some time during the night it shrugged off its skin and became a chrysalis.

I used to freak out when I saw a caterpillar on one of my plants. Now, I’m disappointed when I don’t see them. And now how do I feel when I see them? So happy!

Here is a Black Swallowtail Butterfly caterpillar feeding on a dill plant. The day after I photographed this caterpillar on the dill, it disappeared. I thought it had either died or crawled away to pupate. Then, I found it (I think it was the same one) crawling in the middle of my lawn, far from any twig to attach itself to. I gave it a lift on a stick to one of my fennel plants in case it needed a little more food. The next day I saw it had attached itself to a twig and the day after that it was a chrysalis.

Many of the plants in my garden are members of the carrot family, which are the food source of Black Swallowtail Butterfly caterpillars. I’ve planted bronze fennel, parsley and dill, plus there’s wild Queen Anne’s Lace nearby. So far, the BST butterflies have only laid eggs on the fennel, so I was happily surprised when I found a large caterpillar on a dill plant, which is fifty feet from the rest of my butterfly garden.

The next day the caterpillar was gone, another casualty or was it pupating somewhere? Then I found a caterpillar struggling to crawl in the grass in the middle of my lawn. Where was he going? If he was from the dill plant, he’d already crawled more than 50 feet. I gave him a lift on a stick and stuck him on a fennel plant.  Then he pupated there.

I’m giving a Black Swallowtail Butterfly Caterpillar a ride on a stick. I found him in the grass in my lawn far from anywhere to pupate. Although BST caterpillars can travel a long way, I was afraid he’d be stepped on.

About the Black Swallowtail Butterfly.

What do Black Swallowtail Caterpillars eat?

I’m amazed that I saw this Black Swallowtail Butterfly caterpillar crawling through my lawn. If he was from my dill plant, he’d already traveled more than 50 feet

This is one of the few times I’ve seen this orange gland on an annoyed Black Swallowtail Butterfly caterpillar. Usually, the caterpillars are fairly easy-going and don’t mind me puttering around. The black swallowtail caterpillar has an orange “forked gland”, called the osmeterium. When in danger, the osmeterium, which looks like a snake’s tongue, appears and releases a foul smell to repel predators. I didn’t smell anything, so I’m lucky.

Here’s a Black Swallowtail Butterfly egg on the left. To the right you can see a spider in its web. Butterflies have many predators at all stages in their development.

A Black Swallowtail Butterfly caterpillar rests after a day of eating fennel. It’s amazing that a caterpillar can survive and thrive on only one plant. The orange blobs in the background are cosmos flowers, which the adult butterflies get nectar from.

Here’s one of the early instars (or stages) of a Black Swallowtail Butterfly caterpillars. Below you can see a tiny spider in its web.

I placed the Black Swallowtail Butterfly caterpillar on this fennel plant after I found him in the middle of my yard. He seemed exhausted from his travels.

Below is a beautiful adult Black Swallowtail Butterfly, which I photographed on a coneflower in my garden. In addition to host plants for caterpillars, you also need many nectar flowering plants to attract and feed the adults. Bonus: Nectar flower plants are also beautiful!  From Monarch Watch: Tips on how to start a Butterfly Garden.

 

Click on any photo thumbnail below to see it full-size and in a slide show.

I found this Black Swallowtail Butterfly caterpillar crawling in the middle of my lawn and gave it a ride to this fennel plant, where it attached itself with a sling to a fennel stalk. Some time during the night it shrugged off its skin and became a chrysalis.

Here is a Black Swallowtail Butterfly caterpillar feeding on a dill plant. The day after I photographed this caterpillar on the dill, it disappeared. I thought it had either died or crawled away to pupate. Then, I found it (I think) crawling in the middle of my lawn, far from any twig to attach itself to. I gave it a lift on a stick to one of my fennel plants in case it needed a little more food. The next day I saw it had attached itself to a twig and the day after that it was a chrysalis.

I’m giving a Black Swallowtail Butterfly Caterpillar a ride on a stick. I found him in the grass in my lawn far from anywhere to pupate. Although BST caterpillars can travel a long way, I was afraid he’d be stepped on.

I’m amazed that I saw this Black Swallowtail Butterfly caterpillar crawling through my lawn. If he was from my dill plant, he’d already traveled more than 50 feet.

This is one of the few times I’ve seen this orange gland on an annoyed Black Swallowtail Butterfly caterpillar. Usually, the caterpillars are fairly easy-going and don’t mind me puttering around. The black swallowtail caterpillar has an orange “forked gland”, called the osmeterium. When in danger, the osmeterium, which looks like a snake’s tongue, appears and releases a foul smell to repel predators. I didn’t smell anything, so I’m lucky.

Here’s a Black Swallowtail Butterfly egg on the left. To the right you can see a spider in its web.

A Black Swallowtail Butterfly caterpillar rests after a day of eating fennel. It’s amazing that a caterpillar can survive and thrive on only one plant. The orange blobs in the background are cosmos flowers, which the adult butterflies get nectar from.

I placed the Black Swallowtail Butterfly caterpillar on this fennel plant after I found him in the middle of my yard. He seemed exhausted from his travels.

Here’s one of the early instars (or stages) of a Black Swallowtail Butterfly caterpillars. Below you can see a tiny spider in its web.

Assassin in the Garden

A Wheel Bug, an assassin bug, hangs out on a bronze fennel, which is the home of one of his favorite meals -- Black Swallowtail Caterpillars. This is a young Wheel Bug, which hasn't yet formed the characteristic wheel protrusion on its back.

Every day, I watch the progress of the Black Swallowtail (BST) caterpillars on my huge bronze fennel plant, which is home to a lot of other insects, including this character (see photo) who seemed to be hanging out and doing nothing while sitting on a fennel flower.  Very suspicious.  I thought he was up to no good.  He gave me this look that said:  “Hey, Lady, Don’t look at me.  I’m just minding my own business.”  Yes, exactly. What was his business?  What did he eat?  He wasn’t sipping flower nectar like the bees and wasps and occasional butterfly.  I confess after a couple of days, I gave the fennel a shake and this bug tumbled to the earth.  The next day I saw him slowly making his way back to the top.  I don’t know how much I should interfere to protect “my” BST caterpillars. Was this a “good” bug or a “bad” bug?

I emailed Monarch Watch at the University of Kansas about this bug.  Jim Lovett replied: “Looks like an immature wheel bug to me (Order: Hemiptera; Family: Reduviidae)…if you’re not familiar with this bug be sure to check out some images of the adult. It’s a neat little critter that always captures people’s attention – “little” of course is relative; adults wheel bugs can be 1.5 inches long. They use that piercing/sucking beak to puncture their prey (and can inflict a painful “bite” on us humans if mishandled). FYI – all hemipterans (the “true bugs”) have piercing/sucking mouthparts.”

I asked whether this bug would eat a BST caterpillar.

 Jim’s answer:  “Yes, it would. It is a common predator on caterpillars (and other soft-bodied insects) of all sorts.”

Here’s a link Jim suggested: Wheel Bug.  The Wheel Bug is the largest member of the Assassin Bug family and is related to stink bugs.  Mean and smelly!  But useful, too, because they eat a lot of damaging caterpillars.

 The next day, the Wheel Bug disappeared and so did a few of my smaller BST caterpillars.  I hope Mr. Wheely didn’t eat my caterpillars! 

To learn more about butterflies and caterpillars, click on Monarch Watch.   My most recent post on raising BST and Monarch caterpillars is here:  Survivor — Caterpillar Version.

Survivor — Caterpillar Version

My garden is full of tasty plants to tempt butterflies to lay their eggs. Finally, a black swallowtail butterfly slipped in and laid a few eggs on a bronze fennel. I've been following their progress since before the caterpillars hatched, fretting over these gorgeous creatures and wondering how much I should interfere to keep away crab spiders, dragonflies and other predators.

If you plant it, will they come?  Over the past two years, I’ve planted many kinds of coneflowers and milkweed.  I’ve planted bronze fennel, parsley, bee balm, butterfly bush, autumn sedum and more.  It’s a buffet for Black Swallowtail and Monarch butterflies and others.  But where are they?  I’m not getting much business.  Friends say that the butterflies will come, but it seems a slow year. Maybe a watched garden never produces.  Everything is lush and green, the flowers are blooming, come and get it!

I jumpstarted the process in May when I bought a Monarch caterpillar at the Monarch Watch open house in Lawrence, Kansas, where I also bought three kinds of milkweed.    “Reggie” (from the Latin rex, regis,  for king, a monarch…yes, it’s corny) chewed away for a day and then disappeared.  I hope he successfully moved on to pupation.

A month later in June, I found another Monarch caterpillar, one I didn’t have to buy.  I was thrilled, even though he was voraciously chewing up the one-month planted milkweed, leaving only a stem. I did plant milkweed just for the caterpillars to eat, but do they have to eat so much!  He was almost ready to pupate when I discovered him, and he had the appetite of a teenager!  I said:  “Hey, leave some milkweed for the others!”  Soon, the caterpillar was gone, hopefully moving on to the next stage and not in the craw of a robin.  The milkweed struggled, but finally a few new shoots appeared, and then it began to flourish.  Apparently, milkweeds “know” how to cope.

A Monarch butterfly flitted in and briefly landed on several milkweed plants. Later, I discovered many eggs, each one laid on the underside of a leaf of different plants. I watched the progress as the eggs hatched. Here are two very small caterpillars from July 15, 2009. Today (July 16) when I checked found only one caterpillar, so I don't know whether the other was hiding or had fallen prey to other creatures. It's a dangerous world out there!

Since then, I’ve found eggs on the under side of  the leaves of three of my milkweeds, wondering how they could all support so many caterpillars. Well, I didn’t have to worry about that, because most didn’t survive.   Most seemed to hatch, leaving a tiny hole in the leaf where they were laid, but each day there are fewer and fewer caterpillars.  Will any survive to adulthood? 

The irony is that decades ago when I wasn’t even aware of this wonderful world of caterpillars, I found seven black swallowtail caterpillars on some parsley in my garden. I didn’t know what they were.  I was so horrifed, because I had this revulsion to creepy crawlie things, that I clipped off the “infested” stems and threw them all in the trash. Now, I’d think I’d won the lottery if I found so many BST caterpillars. (OK, maybe I’m exaggerating…)  I’ve regretted that act of destruction ever since.  And who even needs parsley! 

Now I hover over “my” caterpillars, wondering how much I should interfere.  Should I chase away the crab spiders and dragon flies?

For more information about growing plants for caterpillars and butterflies go to Monarch Watch.  To read about J. G.’s beautiful garden, which is a Monarch Waystation, go to my post: Life and Death in the Garden.  For my story on the Monarch Watch Spring 2009  Open House, click here.  Click on the title of the posts, and the stories with photographs will pop up.  Use my search box to find my other stories about butterflies and caterpillars.

I didn't discover this Monarch caterpillar until it was almost ready to pupate. It ate the leaves of this milkweed so quickly and voraciously that it left only a stem. I thought: Hey, leave some for the other guys! I didn't think the milkweed, which I had recently planted, would survive, but it slowly recovered and grew new shoots, ready for the next batch of hatchlings.