EUGENE M. MCCARTHY, PHD GENETICS
I am obliged to report that which is reported, but not to believe it.
—Herodotus, The History, VII, 152
Note: Any claim that hybrids can be produced from this highly disparate and very poorly documented cross would require confirmation.
The German Jesuit and scientist Gaspar Schott records that the Belgian physician Cornelius Gemma (1535-1578) claimed to have seen in his youth a dog with a head like a hawk’s (Schotti 1662, p. 665). Gemma's mention of this hybrid appears on p. 77 of his De naturae diuinis characterismis… (1555 Antwerp).
Gemma brought up this weird hybrid as an example within the context of a discussion of the supposed phenomenon of maternal impressions, that is, the old idea that a mother's undergoing a shocking or frightening experience involving an animal can cause her to give birth to an offspring that resembles that animal (see sidebar at right).
Up until the early twentieth century, it was widely believed that the exposure of a mother to a particular animal, especially an exposure that frightened her, could result in a child within the womb taking on the characteristics of that animal. Thus, it was thought that a woman frightened by a dog stood an increased chance of giving birth to a dog-faced baby. This notion was applied also to animals that gave birth to strange offspring with mixed characteristics. But no scientist today would accept a psycho-spiritual explanation of this sort.
A translation of his brief reference to a dog with a hawk's head reads, in translation,
Of course, merely saying something is so does not make it so.
This old report is mentioned here in part for the sake of completeness, and also to give the reader some idea of former notions concerning the potency of maternal impressions. Dog × hawk is perhaps the least well-documented bird-mammal cross discussed on this website. On the other hand, chicken-human hybrids—which have been reported many times, including two times by scholars—are probably the best documented cross involving a mammal and a bird.
By the same author: Handbook of Avian Hybrids of the World, Oxford University Press (2006).
The following is a list of reported dog crosses discussed on this site. Some of these crosses are much better documented than others (as indicated by the reliability arrow). Moreover, some are extremely disparate, and so must be taken with a large grain of salt. But all have been reported at least once.
Human Origins: Are we hybrids?
On the Origins of New Forms of Life
Cat-rabbit Hybrids: Fact or fiction?
Georges Cuvier: A Biography
Prothero: A Rebuttal
Branches of Biology