phenology

The study of the relationship between climate and the timing of periodic natural phenomena such as migration of birds, bud bursting, or flowering of plants.

The study of the relationship between climate and the timing of periodic natural phenomena such as migration of birds, bud bursting, or flowering of plants (IUCN, 2012a).

The timing of seasonal activities of animals and plants such as bud burst, flowering, fruiting, migration. Also used to refer to the study of such natural phenomena that recur periodically (e.g. development stages, migration) and their relation to climate and seasonal changes.