So two items have already been covered recently in blog posts written by Dr. Mike Merchant in Dallas, so I'm going to direct to those pages and you can get all your information there.
Secondly, would be the cankerworms. If you have oak trees in your area (and this is Texas, so who doesn't have oak trees, right?) then you probably have seen these or at least evidence of their activity. Have you seen the silken threads hanging down from trees? If so, then you have seen webbing from cankerworms. Again, Mike has a great post on cankerworms here.
The last thing I want to cover is a caterpillar you DO NOT want to pick up. This caterpillar has branching spines that can deliver a sting if touched.
|Buck moth caterpillar|
Buck moth larvae are gregarious and will group together for the first three instars (smaller caterpillar stages). After the third instar, they will wander off from the other caterpillars to feed on other plants until it is time to pupate. And remember above how I was talking about oaks in Texas? Well, that is the preferred food of buck moth caterpillars.
The adult buck moths are quite pretty and have a wingspan of 2-3 inches. Wings are blackish in color with a white stripe running through the center with dark eyespots. Females have a solid black body while males have a black body with the tip of the abdomen being reddish-orange.
As mentioned previously, you DO NOT want to pick up the buck moth caterpillars. The branching, urticating spines can deliver a sting when touched. Reaction from the sting can vary but may include immediate pain, itching, swelling and redness.