Describe an example of a species that uses a predictable environmental cue other than photoperiodism to determine either circadian or circannual rhythms. Specify the species, the environmental cue it uses, and the behavioral rhythm that changes based on that cue.

From the textbook, possible answers include: Atlantic marsh fiddler crabs use lunar cycles to determine foraging and mating behavioral cycles; Galápagos marine iguanas use the interaction between diurnal and tidal cycles to change foraging behavior from intertidal foraging to subtidal foraging when high tide takes place at midday; banner-tailed kangaroo roots use lunar cycles to avoid foraging when moonlight is available to aid predators; African lions use lunar cycles to determine when to hunt during the day or night depending on the amount of moonlight available to aid their prey; nocturnal marine worms use moonlight cues to entrain a circalunar clock that synchronizes reproductive cycles and influences mating behavior.