Anadino/ansarino
 

This means duckling and gosling. I think most people use pichón de ganso/pato. Are these two words rare?

I've never seen those words used, not even by bird observers. :thinking:

I've always seen "patito", "gansito" (probably too colloquial), "pollo de pato/ganso".

Thank you. That is what I suspected,