More on birds
In English some common birds seem to have first names. Jenny Wren for example. Or Tom Tit.
In times past there were others. Some have become part of the modern name for the bird.
Jack Daw = Jackdaw
Mag Pie = Magpie
Some have replaced the original.
Robin = Robin Redbreast
Some survive amongst people interested in wildfowl.
Jack Snipe (I heard my father use this)
Some are archaic but once common.
Some may have been contrived in the early 19c. We can't tell.
And what's a parrot called?
There's some linguistic archeology here , with a few more examples. (Don't forget Dicky = Richard!)
Skelton  is a poet I have stubbornly tried to like for decades - and he from centuries back stubbornly tried not to be liked. See what you think of Phillip Sparrow.
 Archaeologia: Or Miscellaneous Tracts Relating to Antiquity, Volume 19.