鴛 is a traditional Chinese hanzi, listed here under the keyword “male mandarin duck (aix galericulata)”. It is built from 夗 (to turn over when asleep) and 鳥 (bird).
On KumiJi Glyph Explorer, open the parts search and type “to turn over when asleep” + “bird”. 鴛 is among the results, together with every other character containing the same shapes.
Open 鴛 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.