Baby robin

Baby robin

Observation - Baby robin - UK and Ireland. Description: My cat brought in this baby bird (which I think must be a fledgling because it is very rare for them to be able to catch anything, the birds often tease them they feel so secure). Does anyone know what it is?

My cat brought in this baby bird (which I think must be a fledgling because it is very rare for them to be able to catch anything, the birds often tease them they feel so secure). Does anyone know what it is?