You can catch insects in Heartopia by using the bubble net. However, to acquire the net, you will have to make progress in the main questline and unlock the Insect Catching Hobby.

Certain species of insect are known to cause damage to historic collections. For more than a decade insects have been identified in traps set out in English Heritage properties, the data from which ...

The Purple Emperor is one of the harder insects to find in Heartopia. Here’s where and when to look for it.