HolQeD 10:4, p. 4: matlh juppu' mu'mey. A nocturnal bird. 

(MO via Michael Roney, Jr., 7/03/2016):  There is already a word that can be used for owl.  It's lIr, which is some sort of Klingon nocturnal bird.  So an owl on Earth would be a tera' lIr ... or just lIr. 

lIr 'obe'       Order of the Owl (KLI)

(Laurence Schoen, 7/26/2018):  In recognition of the efforts in bringing the Duolingo Klingon course into the world, and for the continuing support of this program, the KLI hereby calls into existence the Order of the Owl (lIr 'obe') and proclaims Felix Malmenbeck, Philip Newton, and Jeremy Cowan to be members, to receive special medals indicating their status as well as a formal certificate to that effect.

PUN: 

"Edward Lear is famous for his poem 'The Owl and the Pussycat', and is slightly less famous for his paintings of landscapes--and of birds, particularly owls." (ghunchu'wI') 

SEE ALSO:

bo'Degh         bird (n)
vIghro'                 *v'gro* (type of animal, like a cat) (n)