An immature or baby eagle is called an eaglet.
An immature butterfly is called a caterpillar.
A female swan is called a "pen". (A male swan is called a "cob")
An immature sow
A baby swan is called a cygnet.
The swan is associated with the myth of Leda. Cygnus is Latin for Swan, with Cygnet ( sounds like Signet, which is a publisher!) an immature one of the type favored by Mr. Anderson.
Swan.
A female swan is called a Pen.
A baby swan is called a "sygnet"
A female swan is called a "pen"
The immature form of an animal such as a tadpole is called larva.
The immature form of an animal such as a tadpole is called larva.