I have a theory and massive hope (boyhood hero being referenced here) for fletchling.
With its name possibly deriving from hatchling + fletching,
Fletching a term in crafting arrows, could this little robin have ties to another European Robin who uses a bow and arrow.
Robin Hood.
Please use this for inspiration GF, I will do unworldly things for this to be true.
Hmm.. interesting..yes it is certainly possible that they based Fletchling off Robin Hood to keep with the European Theme..