Not a monarch, but still a caterpillar on milkweed

There were hornworms on the tomato plants. My son picked them off and threw them over the fence before I could get a look, so I've been on the lookout for more. Then I took a tour of the yard. The aphid-infested milkweed host a variety of insects - ladybugs, wasps, etc. - AND some caterpillars!

These are the "other milkweed caterpillar", larva for the milkweed tussock moth, a.k.a. milkweed tiger moth, more specifically euchaetes egle. I trapped one and brought it in for my g'daughter to see. After learning the chrysalis must winter over, I decided I will return it to its natural environment, then try to remember NOT to clean up that small stand of milkweed this fall, ugly as it is.

Also in the yard was this very cooperative swallowtail, enjoying the zinnia.

The Mexican sunflower finally bloomed, much to the delight of this bee, also a cooperative subject.

What's "bugging" you in your yard?