Subject: is this a orange swallowtail
Location: Grand Junction, CO
July 19, 2014 9:49 am
what is this? my cat brought this in the house today. I took it away from her and put it back outside
You are correct that this is one of the Tiger Swallowtail Caterpillars, which look very similar, and the orange color indicates that it is getting ready to pupate. Several species are reported from Colorado according to BugGuide, including the Eastern Tiger Swallowtail and the Pale Swallowtail.