1. Circadian Rhythms: These are the most well-known, with a cycle of approximately 24 hours. They regulate sleep-wake cycles, hormone release, body temperature, and many other bodily functions. Think of your body's internal clock.

2. Ultradian Rhythms: These rhythms have cycles shorter than 24 hours. Examples include the stages of sleep (REM, NREM), the release of growth hormone, and the cycles of hunger and satiety.

3. Infradian Rhythms: These rhythms have cycles longer than 24 hours. Examples include the menstrual cycle in women, the seasonal changes in animal breeding, and the migration patterns of some animals.

4. Circannual Rhythms: These are annual rhythms, with cycles of approximately 365 days. Examples include the hibernation of animals in winter, the breeding seasons of birds, and the shedding of fur or leaves in certain animals.

Let me know if you'd like more information about any of these rhythms!