非洲蜂正在绕着花朵中心打转，同时吸取花蜜；一只黑色黄蜂停在花瓣上。
Africanized honeybees circle the center of an Ochroma bloom, drinking nectar, while a black wasp lingers on a petal rim.
一些著名的大黄蜂种类已经不再常见了，其他的蜂种也越来越稀少。
Some notable bumblebee species are rarely seen anymore, with others becoming increasingly scarce.
微孢子虫是一种蜂类病原体，它也困扰欧洲的大黄蜂。
Nosema bombi is a bee pathogen that has also afflicted European bumble bees.
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