quail
鶉 refers specifically to the quail, a small ground-dwelling bird.
鶉 combines 享 (which may contribute a phonetic element) with 鳥 (bird), forming a character for a specific bird, the quail. The exact historical role of 享 is uncertain.
The left side 享 looks like a plump little bird with a topknot, and the right side 鳥 confirms it's a bird. Together they make a quail, a small round bird.
For ジュン, imagine a quail named June who wears a tiny jun (ジュン) ribbon around its neck. June the quail -> ジュン.
quail
gray partridge (Perdix perdix); grey partridge
common quail (Coturnix coturnix)
barred button quail (Turnix suscitator)
partridge (of genus Perdix)
Japanese quail (Coturnix japonica)
Goodyera schlechtendaliana (species of orchid)
time when moles transform into quails (second climate of the third month)
corn crake; corncrake; land rail (Crex crex)