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Grue Jay

Sept. 27, 2025

Researchers at the University of Texas at Austin have identified the first known hybrid of these species, a bird nicknamed the "Grue Jay," according to a 2025 study published in Ecology and Evolution.

About the Grue Jay

  • The Grue Jay is a rare natural hybrid between the Blue Jay (Cyanocitta cristata) and the Green Jay (Cyanocorax yncas).
  • It displays turquoise-blue plumage with black facial markings, combining features of both parent species.

Key Features of the Grue Jay:

  • Appearance: Body and tail resemble Blue Jay, but the face mask resembles Green Jay.
  • Behaviour: Calls are a blend of both species; they appeared solitary rather than socially integrated.
  • Reproduction: Being a male, it may be capable of reproducing, though hybrid sterility remains a risk.
  • Symbolism: Like other hybrids such as the “Pizzly Bear” (polar bear–grizzly) and “Zonkey” (zebra–donkey), the Grue Jay highlights species interactions under stress.

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