from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The scientific study of periodic biological phenomena, such as flowering, breeding, and migration, in relation to climatic conditions.
  • n. The relationship between a periodic biological phenomenon and climatic conditions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The study of the effect of climate on periodic biological phenomena.

from the GNU version of the Collaborative International Dictionary of English

  • n. The science of the relations between climate and periodic biological phenomena, as the migrations and breeding of birds, the flowering and fruiting of plants, etc.

from The Century Dictionary and Cyclopedia

  • n. That branch of applied meteorology which treats of the influence of climate on the recurrence of the annual phenomena of animal and vegetable life.


from The American Heritage® Dictionary of the English Language, 4th Edition

pheno(menon) + -logy.


  • Hydrology, the research gathers together more than 25,000 long-term phenology trends for 726 species of plants and animals.

    D Mag - News

  • Hydrology, the researchers said they analyzed more than 25,000 long-term phenology trends for

    Latest News -

  • The study of the seasons, known as phenology, is important for measuring how the weather is changing in Britain with global warming. - Telegraph online, Daily Telegraph and Sunday Telegraph

  • The timing of seasonal biological events, otherwise known as phenology, has been tracked in some places for centuries.

    Mother Earth News Latest 10 Articles

  • Scientists who study how seasons affect plant and animal life cycles -- it's called phenology -- say that on average, spring comes several days earlier now than it did a few decades ago.

    NPR Topics: News

  • Data from Envisat's Medium Resolution Imaging Spectrometer (MERIS) are being used to generate daily maps that show exactly how plants are responding to the coming season, marking a significant improvement for 'phenology'.

    RedOrbit News - Technology

  • Add "phenology" to the search reduces the hits to a more manageable "about 4,630″.


  • Native solitary and bumble bee populations are plummeting as global warming affects the timing, or phenology, of plants flowering, which is now occurring about 2.3 days earlier in the season.

    Dr. Reese Halter: Protecting Our Wild Prairies

  • Marsham wrote the event down, in effect inventing a new field of study, phenology – the effects of cyclic and seasonal phenomena on plants and animals.

    Spring's here: skylarks overhead, moles in the garden, moths in the bathroom

  • These changes follow the pattern found by Dr. Terry Root and colleagues published in Proceedings of the National Academy of Sciences the average shift in the behavior -- phenology -- of 130 species from 1970 to 2000 means that spring is now arriving on average 10 days earlier in the Northern Hemisphere.

    Brenda Ekwurzel, Ph.D.: Curious Observers Lend a Hand


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  • Interesting--thanks, John. This is big in birding, but I never knew it had a specific term to describe it.

    September 16, 2008

  • "Phenology is the science of natural occurrences, yearly events like the first snow, the first blooming of hepatica and the arrival of the first whippoorwill. Keeping diaries of such occurrences was a hobby of counts and lords in Europe, and there are records in Kyoto, Japan, of the flowering of cherry blossom trees dating back 900 years. Among the most notable American phenological records were those kept by Thomas Jefferson at Monticello and Henry David Thoreau at Walden Pond."

    The New York Times, Weather History , by Anthony DePalma, September 15, 2008

    September 16, 2008

  • The study of the timing of recurring natural phenomena such as migrations or spring flowering. A formerly obscure science now important for detecting effects of climate change.

    April 9, 2008