Zentangles from Art 42

With a name like Zentangles, there must be something deep or witty I can say about them. Or do they speak for themselves?

Top left: by Strawberry (Art 42)

Top right by PYRO kathleenstitches from Tualatin, Oregon

Flower on lower left: R.E. Yang (?)

Bird on lower right: JoAnn Reichert of Butler, Pensylvania