This morning as I went out to check on my caterpillars I noticed that some were missing. I was concerned, as we had had a pretty violent thunderstorm last night so I was worried that perhaps they had been knocked, or blown off the fennel. I looked around and realized to my delight that they were fine, but they had begun the next stage in their lives. I found three one, coincidentally enough, on the butterfly weed

one on a fennel stalk that had fallen down

and the last on the gate of my arbor

I checked on the other caterpillars and they were all sleeping. Suddenly one twitched and arched its back, making it look for all the world like the caterpillar in Alice in Wonderland.

at which point (there is no delicate way to put this, it did an enormous poo. (no I didn't take a photograph of that
Then the caterpillar set out on its journey down the fennel, in search of just the right spot. I wondered as I watched it what, if anything it thought of that, leaving what has been its entire world for its short life to venture out into the unknown. If they feel at all, then I should imagine it is fear, or perhaps, as I suspect at this point they are just driven by pure instinct. Without stopping once for a final snack he began to look for a suitable spot to begin his journey to becoming a butterfly. I am not sure what they look for when looking for a suitable spot, but it appeared to me that the process involved a lot of sniffing, and feeling with the nose and mouth.

If a spot did not look right then they moved on. (At this point I should let you know that I was monitoring three different caterpillars making this journey, which is why you see them in different places in the flower bed).

Once a suitable spot had been found then the caterpillar began to "mark" it, almost like a cat (I wonder if this is where the name comes from?) marks various parts of its territory (including its humans) by rubbing its cheeks against it. I speculated while watching this behavior that this part of the process had something to do with creating the silk that eventually would anchor the chrysalis to the chosen spot. However nothing could be seen by (my) human eye. I was delighted to discover, on uploading my photographs that this indeed was the purpose of the "marking" as you can clearly see the silk in this shot.

At one point the caterpillar reached all the way around the stalk to no doubt ensure that the silk was well anchored.

In addition to the "marking" there was also a move where the "forehead" was pressed hard into the spot, I am not sure what this was for, other than if you look at the completed chrysalis it is anchored at the head and tail and the center is away from the spot. Once the "marking" process was complete the caterpillar scrunched itself up in a chrysalis shape and sat motionless. All of a sudden the caterpillar would decide, for some reason unbeknownst to me, to turn around

Whereupon it would sit, in its chrysalis shape for a certain period of time before again turning around and sitting upright again. I have no idea what this phenomena has to do with but it is no doubt essential to the entire process as all three caterpillars that I was watching did the same thing.

Eventually this turning around behavior stopped and the caterpillar stopped moving entirely no doubt its journey from caterpillar to chrysalis had disabled it.

I have to admit that the entire thing was utterly fascinating and I am extremely grateful that I got to witness it. I am also delighted that all of the caterpillars are where I can monitor them to check on their progress, as in years past I could never find any of the chrysalises that resulted from my caterpillars.
So now we wait...