How does camouflage help nightjars rest during the day?

Nightjars, which belong to the order Caprimulgiformes, rely on exceptional natural camouflage to remain hidden while resting during the day. Their plumage, characterized by various shades of brown, gray, black, and white, is intricately patterned to match their specific daytime environments.1

This protective coloration helps them survive by allowing them to blend seamlessly into their surroundings:

• Woodland dwellers: These birds feature streaks and spots that mimic the appearance of fallen leaves and forest floor detritus.1
• Gravelly terrain dwellers: These species are often speckled or patterned to resemble the stones scattered across their habitat, helping them blend in or appear as part of the landscape.1
• Alarm postures: When threatened, many caprimulgiforms enhance their camouflage by adopting specific postures. For example, some species stretch their bills upward and flatten their plumage to resemble dead branches or stubs, effectively disappearing into the environment.12

By remaining motionless and relying on these cryptic patterns, nightjars avoid detection by predators while they sleep during daylight hours.31