How to Use photoperiod in a Sentence

photoperiod

noun

• There are some tree species triggered by photoperiod and will turn just because of that.
  — Stephen Underwood, Hartford Courant, 24 Aug. 2026
• Most of the birds that are important to the Louisiana duck hunter harvest are photoperiod migrators [such as teal].
  — Natalie Krebs, Outdoor Life, 14 Jan. 2026
• The genetic machinery for responding to photoperiod is deeply conserved; there is no evolutionary precedent for light at the wrong time of night, and therefore no adaptive buffer against it.
  — John Drake, Forbes.com, 28 May 2026
• The shutdown is triggered primarily by photoperiod, not temperature.
  — John Drake, Forbes.com, 28 May 2026
• Why some cold-weather animals developed this adaptation and others didn’t is less well understood, but the change appears to be set off by the changing number of sunlight hours in the day as winter approaches (called a photoperiod), Rumble said.
  — Jonathan Shikes, Denver Post, 30 Dec. 2025