European robin 

Erithacus rubecula

European Robins are solitary and highly territorial throughout the year. Both males and females establish and rigorously defend their individual feeding and living areas, even in winter. While they are typically not found in groups, there are various collective nouns used to describe them, including a flock of robins, a round of robins, a blush of robins, a bobbin of robins, and a squabble of robins.