...species of flying insects.是什么意思？

...species of flying insects.

飞行昆虫的种类

species

n. 物种，种类，类型，[逻辑] 个体；

例句
Some animal and plant species cannot accommodate to the rapidly changing conditions...
某些种类的动植物不能适应迅速变化的环境。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

flying

adj. 飞行的，会飞的，迅速的；n. 飞行，驾驶飞机；v. 飞(fly的现在分词)；

例句
Louisa was dancing, spinning by herself, her skirt flying out and coiling around her feet...
路易莎打着圈儿翩翩起舞，裙摆时而肆意飞扬，时而盘绕脚边。

insects

n. 昆虫( insect的名词复数 )，虫类；

例句
Flowers are designed to attract insects which then carry the pollen from plant to plant...
花的作用在于吸引昆虫，然后昆虫再将花粉传到其他植株上。