"Groups of hungry locusts devour any creature who makes the mistake of standing in their way."
This should probably be changed to:
"Groups of hungry locusts devour any creature that makes the mistake of standing in their way."
As per http://grammarist.com/usage/that-who/, "As for whether it’s okay to use who in reference to animals, this is a matter of preference. Some people think of their cats, for instance, as thinking beings with real personalities and wouldn’t hesitate to refer to them with who. The same people might not do the same for, say, a jellyfish. But most edited publications use that and which in reference to animals."
In this circumstance, the creature(s) being devoured by the Locust can be anything, from humans to animals to micro-organisms, so "that" is a more appropriate pronoun.
The description of the Locust currently reads:
"Groups of hungry locusts devour any creature who makes the mistake of standing in their way."
This should probably be changed to:
"Groups of hungry locusts devour any creature that makes the mistake of standing in their way."
As per http://grammarist.com/usage/that-who/, "As for whether it’s okay to use who in reference to animals, this is a matter of preference. Some people think of their cats, for instance, as thinking beings with real personalities and wouldn’t hesitate to refer to them with who. The same people might not do the same for, say, a jellyfish. But most edited publications use that and which in reference to animals."
In this circumstance, the creature(s) being devoured by the Locust can be anything, from humans to animals to micro-organisms, so "that" is a more appropriate pronoun.