Carnivorous plants still rely on photosynthesis as their main source of energy. However, because they grow in areas where the soil lacks essential nutrients, they use the insects they capture as a source of nitrogen and other minerals.
Scientists aren’t exactly sure how butterflies evolved this way, but evidence suggest that these ears might be evidence that bats created butterflies by driving moths into the daylight. The idea is that with the evolution of bat echolocation, moths had to find some way of avoiding the predator’s jaws.
The hope is that as the fly walks across the surface, its little body charges up, allowing poisonous spores to stick to its body like metal shavings to a magnet. If this happens, then soon enough, the fly will walk no more.
Contrary to popular belief, you don’t have to have fruit in your house to have fruit flies. All you need is fermenting organic matter that remains wet or moist. Most likely, that’s going to mean drains–sinks, showers, etc. In particular, fruit flies tend to breed in slow-moving or seldom-used drains in which a layer of slime has built up.
The relationships between plants and insects are often intricate and complex. One such relationship is that between the yucca plant and the yucca moth.