Butterflies do not just hatch from the egg with wings.
They must first go through a larval stage called caterpillar.
Then they have to bind themselves up for a while to go through metamorphosis.
While they are wrapped up(pupating) in the chrysalis (not pictured),
all their cells rearrange into a butterfly or moth. Then they have their wings.
Now everybody loves butterflies and colorful moths.
What if we went around killing all the weird and spiky worms in our yards?
Then there would be no lovely fliers later, because everyone killed them as babies.
If you don’t ” love some larvae”, leave them alone.
They are waiting for their wings.