I sure thought this was a centipede, but you can count the legs per segment. This was in the Founders' Grove in Humboldt State Park.

Redwood Sorrel growing in the Founder's Grove, in Humboldt Redwoods State Park, CA.

These water horsetails were growing about 40 feet from the Eel River.

One of the kids spotted this one. She knew it was a stink bug, so I looked it up just now for a more precise name. Seems like a green stink bug.

Appeared to be a Pacific Tree Frog. It was out on dry, sunny ground near the Eel River. Later took to the water.

Tended to hang on to stalks of plants. Was not aggressive.