Hi Julie,

What a fun find! You discovered a white-lined sphinx moth caterpillar. The caterpillars come in a wide variety of color variations. They also feed on a variety of host plants including purslane. 

Here is more information: 

• White-lined sphinx moths: http://www.wci.colostate.edu/Assets/pdf/CIIFactSheets/Whitelined.sphinx.pdf
• Sphinx moths in Colorado (we have about 30 species): https://extension.colostate.edu/docs/pubs/insect/05517.pdf

Let me know if you have any questions! 

Thanks,

Lisa

Lisa Mason
Horticulture Specialist, Entomologist
Colorado State University Extension, Arapahoe County

Thanks, I must have had a lot of eggs. Looks like I had an older one too

Sent from my iPhone