a swan
Examples
Were I a nightingale, I would act the part of a nightingale; were I a swan, the part of a swan.
If you're looking for monogamy, you'd better marry a swan.
Did not Jupiter transforme himselfe into the shape of Amphitrio to embrace Alcmæna; into the form of a swan to enjoy Leda; into a Bull to beguile Io; into a showre of gold to win Danae?
I don't know if you have ever seen a tiger of the jungle drawing a deep breath preparatory to doing a swan dive and landing with both the feet on the backbone of one of the minor fauna. Probably not, nor, as a matter of fact, have I.
In the eyes of its mother every turkey is a swan.
A swan would die with pride only for its black feet.