HolQeD 10:4, p. 4: matlh juppu' mu'mey. The plural suffix for birds is usually -mey, the general plural suffix, as would be expected. There is a difference of opinion, however, about which plural suffix to use for a few birds capable of mimicking speech, such as the vIlInHoD and the qaryoq (and the larger qaryoq'a'), with some Klingons using -mey but others preferring -pu', the plural suffix for beings capable of using language. Maltz is a member of the former camp; he said he was never able to engage a qaryoq in a conversation that made any sense.