Note: No hyena hybrids seem to have been reported, other than the old and poorly documented allegations below. If you know of any well attested cases of hybridization involving hyenas, please contact the website.
Crocuta crocuta [Spotted Hyaena] Lönnberg (1908) treated two forms of hyena as distinct species under two distinct scientific names. As Theodore Roosevelt and Edmund Heller (1914, pp. 261-262) note, “One of these names, kibonotensis, he [i.e., Lönnberg] applied to a reddish animal having a short tail, the other, panganiensis, to a grayish one with a longer tail. These two color and tail extremes, together with every intermediate stage, are represented in specimens from the Loita Plains and the Uasin Gishu Plateau in the National Museum collection. They will be found to occur in any large series from any locality throughout the distribution of this hyena and are to be regarded simply as evidence of the variability of the race.” Due to this evidence of interbreeding, Hollister (1918, p. 144) lumped the two under Crocuta crocuta.
Hyaena hyaena [Striped Hyena]
× Canis familiaris [Domestic Dog] Nott (1856, p. 495) states that the dog produces hybrids with the hyena, “but to what extent has not yet been determined.” However, he provides no citation, and this cross does not appear to be substantiated by any reliable report, although it is mentioned by various early writers (e.g., Scaliger 1612, p. 648). Hyenas, along with foxes, wolves and jackals, do figure in the speculations of various authors concerning the origins of the domestic dog. Blumenbach (1776, p. 9) notes that Bochart (1663, p. 832) suggested that the jackal (Canis aureus) was a product of this cross.
× Canis lupus [Wolf] This cross is listed in early texts, but is not substantiated by any reliable modern report. Conrad Gesner (1560, p. 78) says, “The hyena conceives by a wolf and brings forth Onolysum, as it is pronounced (it is written Monolycum), which lives not in a herd but as a solitary, and wanders among men and flocks, as a Greek wrote recently, who attributes to him indeed rough thick hair: and without neck vertebrae and stiffened in one upright bone” (translated in Zirkle 1935, p. 34).
× Panthera leo (♀) [Lion] Ancient authors mention this cross, but such claims have not been substantiated by any reliable modern report. Pliny the Elder (Naturalis Historia, VIII, xlv) relates an ancient myth, saying that when a lioness is crossed with a hyena, it “gives birth to the corocotta, that mimics the voices of men and cattle. It has an unbroken ridge of bone in each jaw, forming a continuous tooth without any gum, which, to prevent its being blunted by contact with the opposite jaw, is shut up in a sort of case” (Rackham 1961).
By the same author: Handbook of Avian Hybrids of the World, Oxford University Press (2006).
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Branches of Biology