Above: a California sycamore with most of its root base exposed. The tree still lives, as it tendrils reach down into the bed. Notice the rock it's cradling (about mid center); I wonder how long the exposed roots have been holding this stone.
Above: a more complete view of the same tree.
Above: Another tree with an apparent tenuous hold on the bank.
Above: A velvet ant observed away from the stream.These are about the size of a honeybee and are definitely not camouflaged.
Above: one more look at the frog that inspired this post.