The Sibley-Munroe checklist was a landmark document in the study of birds. It drew on extensive DNA-DNA hybridisation studies to reassess the relationships between modern birds.
... = l + r^i
(Sanskrit recognizes vocalic r (errr) and l (ulll), unlike, say, English)
Diphthongs (Combinations of Simple Vowels)
e - hay
ai - aisle
o - ...