The birds they followed were part of a well-monitored population of blue, great and marsh tits in a wood near the institute.

他们跟踪的鸟是研究所附近树林中一些受到严密监控的蓝山雀、大山雀和沼泽山雀。

I'd rather be pecked to death by an angry blue tit.

我宁愿被一只愤怒的蓝山雀啄死。

This group noted that, during any given breeding season, the blue tits they were investigating tended to incorporate the same herbaceous plants into their nests regardless of how abundant those herbs actually were.

该小组指出，在任何给定的繁殖季节，即使草本植物的种类十分丰富，观察到的蓝山雀也往往会用相同的一种草本植物筑巢。