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NE only has to look at this pretty little 
QO creature as it hunts for insects on the branch 
of a tree to understand how it got its title ; for, while it is 
distinctly blue in colour, its movements are much more 
suggestive of those of a mouse than a bird, and one is almost 
surprised, sometimes, to see it fly away. It is even com- 
moner than the great tit, and will find its way even into 
gardens in the heart of a large town. 
When the mother bird is sitting it is very difficult to make 
her leave her eggs, and she will peck fiercely at the fingers 
105 
