The fruit fly has timekeeping mechanisms distributed throughout its body. S.A. Kay. 1997. Independent photoreceptive circadian clocks throughout Drosophila. Circadian clock in Malpighian tubules. Raloff, J. 1996.
Eyes possess their own biological clocks.
Resolving the magnetoreception puzzle Researchers have discovered the mechanism by which trout sense Earth's magnetic field. Structure and function of the vertebrate magnetic sense. Homing in on vertebrates. Travis, J. 1995. Fishing out magnetoreception's secrets.