She didn't consider whether it was a sign of danger or of help, only that it wasn't dark.
Times, Sunday Times
There was no sign of danger.
The Sun
They said we have evolved to see it as a sign of danger, helping us know which foods are safe to eat and to read people's reactions.
The Sun
They are swift runners, darting away to their burrows at the slightest sign of danger.
Retrieved from Wikipedia CC BY-SA 3.0
Ghost crabs are swift runners, darting away at the slightest sign of danger.
Retrieved from Wikipedia CC BY-SA 3.0