Need image with size reference (coin) or a measurement.

Roughly the size of a quarter in length and they seemed to have legs the entire length of their body, not just at the front like I see pictured so often.

Any chance of a better picture?

Sorry, I absolutely hate bugs. I have a less blurry picture.

I forgot to put down a quarter for reference but again, they're about that size in length.

I never would have guessed they were caterpillars!! Well I am glad to know I am not on the verge of a beetle infestation. Thank you!!!

The first ones look...different.

Everyone I have found varies slightly in color and width. Maybe in different stages of life? The first ones were definitely the fattest. If I find more I will continue to photograph.

If the first were fatter, the second group would not be the next instar (stage) of the first group. All caterpillars have 13 body segments, but I'll be darned if I can ever count them accurately in forum images.

If that includes the ends I count 12 on every picture when I zoom in :/ Then again I feel like that's similar to trying to count your teeth using just your tongue.

If it helps, I am in Arizona and have grass in the front yard. The grass in one particular area started to die (though it's tough to keep grass alive in the summer here and we didn't reseed either) about a month ago when the temps really went up. We have not found any of these in the grass or in the driveway, making me think they come in the garage and house to escape the heat or the sun?

Looks like they could be palm flower moth caterpillars.

Sounds like they can do some damage if they get inside your house. U of A link

Holy guacamole!! My house has a giant palm tree and I have never owned one before to know about these bugs! It started to flower about a month ago. Omg, thank you!!!!