The red breast of adult Robins is instantly recognisable making this species one of the most straightforward to identify. Juvenile Robins lack the red breast and have brown upper parts and breast speckled with dark brown. Bit by bit the red breast starts to appear in late summer, but even in juvenile plumage the round shape, long legs and cocked head postures are characteristically 'Robin' in nature. Robins have a delightful musical song and pitched higher than that of a Blackbird. Being territorial all year-round means that Robin song can be heard throughout the winter months, and Robins can often be heard singing at night throughout the year, prompted by street lighting.
Robins like to nest in thick, overhanging vegetation, so an ideal site for a box might be attached to a fence which has got climbing plants growing up it.