Animals
16
are fi ctitious monsters (the griffi n and the unicorn). The manticora, the
medieval reader learned, was a man-eating beast with a lion’s body and a
man’s face. The unicorn was the size of a goat, was both swift and fi erce,
and could only be captured by a young virgin. The phoenix, dying on its
funeral pyre to come to life again, was reported as factually as any other
animal. Some bestiaries tried to be careful, and one 12th-century work ex-
plained to the reader that the many-headed hydra dragon was a myth.
Bestiaries passed on the accumulated scientifi c knowledge of animals,
often from Roman sources like Pliny the Elder. The information was more
often inaccurate than accurate. For example, a 12th-century reader learned
from one bestiary that the livers of mice are enlarged at the full moon,
that weasels give birth through their ears or mouths, that rams butt heads
because it helps the itching in their brains caused by worms, and that el-
ephants live 300 years. Some accurate information could be found in a bes-
tiary, especially concerning animals native to Europe. The stag’s rutting
season was accurately described, as well as the deer’s habit of giving birth in
a hidden place. Bestiary writers observed that deer moved upwind to mask
their scent, migrated from pasture to pasture, and crossed rivers in a line.
Even in relatively accurate information, inaccuracy and folklore intruded.
Stags eat snakes to cure their sicknesses, said the writer, so if you want to
keep snakes away, use the ashes of a burned stag’s horn.
Writers of the later Middle Ages tried to improve the accuracy of these
sources. The Dominican monk Albertus Magnus, writing in the 13th cen-
tury, composed De Animalibus, a many-volume encyclopedia of animals
based on the ideas of Aristotle, with several original volumes from his own
observational knowledge. His motivation for writing was still to educate
preachers and other writers about animals they might not have seen and
to apply the animals’ traits to moral teachings. However, unlike previous
copiers and annotators of bestiaries, Albertus Magnus tested the unques-
tioned knowledge of the ancients by experimenting. He verifi ed that moles
did not have eyes but found that neither did they have black oil for eyes, as
Aristotle had said. His concern was to make an accurate book as much as a
complete book.
Veterinary information was nonexistent at fi rst, and animals had no med-
ical care. But as the wealthy began to have highly bred, well-trained animals,
they wanted to know how to treat their disorders. Medical philosophy of-
fered the same framework to animal medicine as to human medicine. All liv-
ing things were made up of hot and cool, wet and dry. The creature’s overall
complexion was the way these four humors were balanced. Bees were cold
and dry, while horses were hot and dry. Fish, obviously, were cool and wet.
This system was very consistent and passed as scientifi c, but it could recom-
mend few practical therapies for colic, sprains, worms, or injuries.