The shells of modern sea turtle hatchlings are dark colored — this pigmentation gives them protection from aerial predators (such as seagulls) as they float on the ocean surface to breathe. (sciencedaily.com)
They have a third eye on the top of their heads called the parietal eye, which has a primitive retina and lens and is used to sense aerial predators. (newscientist.com)
Similarly, meerkats, Suricata suricatta, respond to aerial predator alarm calls by freezing, scanning and running for cover, and to terrestrial predator alarm calls by moving towards the sound source while scanning the area [3]. (journals.plos.org)