Scripture is explicit

Is it a sin to kill bugs?

Q: Does the Bible say anything about insects?

It classifies some as clean for eating - locusts among them - and uses them in plagues and parables. It nowhere treats killing one as a moral question.

Q: Is it a sin to kill animals for food?

No. Scripture explicitly permits it after the flood, and the sacrificial system assumes it. Vegetarianism appears in the Bible as a choice, not a command.

Q: What about hunting for sport?

This is where the character question in Proverbs is usually raised. Traditions differ, and the argument turns on necessity and on whether pleasure is taken in the killing.

Q: Do animals have souls?

Christians have disagreed for centuries, and Scripture does not settle it. The question about how to treat them does not depend on the answer.

No, and Scripture still has something to say about how you treat animals

A moth resting on a sunlit windowsill beside an open, cupped human hand.

In short

No. Scripture places humanity over the animals and never treats killing an insect as an offence. It does treat cruelty to animals as a mark of character, which is a different question and the one actually worth asking.

What the text says

Genesis 1:28

And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.

The word carries responsibility rather than licence, and it is why Scripture can place humans over the animals and still measure a person by how they treat one.

Genesis 1:28 was the verse of the day on August 5, 2015. See that day

Often brought inProverbs 12:10

A righteous man regardeth the life of his beast: but the tender mercies of the wicked are cruel.

How a person treats an animal is offered as a measure of the person. The proverb is about character rather than about the animal's rights.

The counterweightMatthew 10:29

Are not two sparrows sold for a farthing? and one of them shall not fall on the ground without your Father.

Not a sparrow falls without God noticing. Small creatures are not beneath his attention, which is a check on treating them as nothing at all.

What Christians agree on

Killing an insect is not sin in any Christian tradition. Deliberate cruelty for entertainment is a different matter, and Proverbs treats it as revealing.

Where they disagree

The standard reading

Dominion is real, pest control is ordinary, and no text suggests otherwise. This is not a question Scripture treats as open.

Genesis 1:28

Those who stress stewardship

Dominion means responsibility rather than licence. Needless killing, even of small creatures, sits poorly with the care Scripture assumes.

Proverbs 12:10

Questions worth asking

Is this necessary, or am I enjoying it?
Would I do the same in front of a child I was teaching?

This question is asked most often by children, and by adults who were told as children that it was wrong. It is not, and the concern underneath it - about needless harm - is worth keeping even though the answer is no.