Anybody have any ideas what this critter is? I found 5 on my lime tree today and 4 on my lemon tree last week.
What's this on my lemon/lime trees?
They look like swallowtail caterpillars to me. Citrus trees are the host plant for them Here is a link of some pictures, scroll down toward the bottom. they aren't exactly like yours but they are a few diferent types of swallowtails and I am sure each kind is a bit different.
http://www.geocities.com/brisbane_butters/Orch_butt.htm
I'd agree with swallowtail - and suggest Giant swallowtail, or 'orange dog' as is apparently another name for the cats.
http://bruceslog.blogspot.com/2006/08/giant-swallowtail-caterpillar-papilio.html
I think you're right, it has the little red things that come out when you move them too. Have you had any experience with these? It doesn't seem like they are harmful, but I'd like to get rid of them if possible, I'm not a bug lover!
I would let them be... they don't eat too much and will metamorphisize into a fantastic giant swallowtail. If you really must get rid of them, you could put them on a different citrus tree that you aren't as concerned with.
The giant swallowtail is one of our most magnificent native butterflies. PLEASE do not kill these. They look like bird oppo as that is nature's way of protecting them until they can form their cocoon, and eventually emerge as that big, gorgeous butterfly!
Please let it live...those butterflies are so big and beautiful! They delight so many people who enjoy watching them. They really do little damage to the plants. If there are any Hop Trees or other citrus trees whose owners don't mind, they can be moved. If I lived near you, I'd take them...I have the Hop Trees and raise them.
http://www.butterflygardeningandconservation.com/butterfly/st/giant.php