Proportion of blue tits to first attack the different offered

The Blue Tit – Birds to look out for in your garden part 2

A Blue Tit diary BTO - British Trust for Ornithology

PDF) Shape of Evasive Prey Can Be an Important Cue That Triggers

Marianne ELIAS, Research Director, CNRS MNHN

Marianne ELIAS, Research Director, CNRS MNHN

Moment two male blue tits come to blows in battle over territory that leaves one missing an EYE

Irena KLECKOVA, PhD

Eurasian Blue Tit (Cyanistes caeruleus) - Bluest Of The Blue

BLUE TIT (Cyanistes caeruleus) - songbird factfile