One assessment found that 50% of leafcutter bees and 27% of mason bees are considered at risk.

项评估发现，50% 的切叶蜂和 27% 的石匠蜂被认为处于危险之中。

And this pungent tune helps keep Hoplocampa testudinea, the European apple sawfly, from being eaten.

而股刺鼻的气味有助于防止欧洲苹果叶蜂（Hoplocampa testudinea）被吃掉。

And these stylish-looking leaf-cutter bees found in the western U.S., some of these bees are as small as a grain of rice.

美西部发现的时髦的切叶蜂，其中蜂只有粒米那么小。