1887 Critic (N.Y.) 23 Apr. 23/1 The meadow-mouse taking her siesta when it is ‘ninety in the shade’, becomes the subject of a series of experiments that go far to corroborate the hypothesis of an estivating as well as a hibernating instinct in many of our small wild animals.

1906 Elem. School. Teacher 6 412 Æstivating habits and adaptations.

2006 Jrnl. Vertebr. Paleontol. 26 126 a/1 The appearance of conspicuous estivating behavior..suggests that evolution of some physiological characters may occur relatively quickly as a response to environmental stress.

1860 Westm. Rev. 73 Index p. i/2 Ceylon,..Æstivating fish.

1920 Jrnl. Rom. Stud. 10 15 The Muncel became, in the first years of the Roman occupation, a favourite resort of such aestivating Roman officials as had no taste for the baths.

1925 Jrnl. Parasitol. 11 211 The aperture was solidly cemented to, and tightly closed on, the support, exactly as estivating snails fix themselves in tropical regions to the bark of trees.

1984 P. Matthiessen Indian Country ii. 17 A norther that had caused the aestivating tree snails to fall from their wood niches.

2003 Mammalian Species No. 721. 5/1 Clay capsules of estivating lungfish..are peeled away [by honey badgers] to expose the soft inner parts to be eaten.