Over the Christmas period robins are on the look out for a mate and are more vocal in their singing.
In the 19th century postmen wore bright red uniforms and got the nickname robin or redbreast. Robins then made an appearance on Christmas cards to represent the postmen delivering them.
The robins breast feathers are actually orange and not red. When they got their name there was no word in the language for orange. It wasn’t until the 1500’s that orange was used to describe a colour by which time the name redbreast was well established.