The tradition is that when our Lord was on His way to Calvary,
a robin picked a thorn out of His crown, and the blood which issued
from the wound falling on the bird dyed its breast with red. (See Christian Traditions.)
Bow Street runners were so called from their red waistcoats.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Robin Redbreast from Fact Monster:
- robin - robin robin or robin redbreast,common name for a migratory bird of the family Turdidae (thrush ...