Many of our little songbirds abandon their territories in the winter and flock, sometimes in large numbers; but not the robin. Robins stick to and defend their territories right through the winter and their winter song is part of that defence.
Singing in winter is a high risk strategy. It uses a lot of energy when food resources are low but hanging on to a good territory right through the winter gives a robin an advantage in the spring when the breeding season begins. His winter song is shorter, quieter and altogther smaller than it will be come the spring.
Header photograph by Suzanne Humphries