The bright green caterpillar with yellow and black slashes and a blue tail is called a Cecropia Moth. They can measure up to 4 inches long and are considered large compared to other caterpillars.
It's a Lime Hawk Moth caterpillar, i came across one myself today
A caterpillar that is bright green with a spike on it is the Tomato Hornworm. These caterpillars are very destructive and can ruin a tomato plant in a day.
This could possibly be a bedstraw hawk moth caterpillar
The Cecropia silkmoth is a light green as a caterpillar. It has blue spikes all around its body and black spikes near its head.
This caterpillar is called a Cerura Vinula. When it turns into a moth it is called a Puss Moth and they can be up to 3 inches in length while they are still a caterpillar.
http://bugguide.net/node/view/3741#id
Could be a tomato hornworm
A caterpillar that is green with a black spike at the end of its tail is the Puss Moth. They can be found in willow trees.
The hungry caterpillar So, can one get a serious answer on this site?
The sphinx moth caterpillar, also known as the hornworm, is a lareg, light green caterpillar with a longi brownish-red spike at its tail. Additionally, it has a pair of eyespots on each abdominal segment.
I don't know but i found the same caterpillar and i am curious as to what it is too.
The caterpillar of the Io moth seems to fit your description. The related link has pictures.
The name of the lime green caterpillar with an orange head is the cecropia moth caterpillar. The entire body is lime green except for a few small parts on the head which are a bright orange color.
green prickly caterpillar
The caterpillar that is black with a lime green jacket is the Saddleback Caterpillar. These caterpillars can sting and it will be very painful.
green slashed caterpiller
a bojencken caterpillar and they are poisen
American Dagger Moth Caterpillar.... I found one in my drive way
a caterpillar.