Matutinal
Videos
In the life sciences, matutinal, matinal, or matutine animals are active around morning twilight, when they scan for mates, mate, and forage.
Birds flying before dawn over the Maasai Mara
A praying mantis (Mantis religiosa) blending in with its environment. To mate, they must terminate this pose and take up a more vulnerable one. They only do this during matutinal hours.
A superb fairywren (Malurus cyaneus). This bird engages in extra-pair copulations during pre-dawn and early morning hours.
A blue shark (Prionace glauca). These sharks spend more time at the ocean's surface during matutinal hours - likely for predatory reasons.
Twilight
Videos
Twilight is daylight illumination produced by diffuse sky radiation when the Sun is below the horizon as sunlight from the upper atmosphere is scattered in a way that illuminates both the Earth's lowe
Matutinal
…In the life sciences, matutinal, matinal (in entomology), or matutine animals are active around morning twilight, when they scan for mates, mate, and forage. Matutinal and vespertine behaviors are the morning and evening aspects of crepuscular activity…
Twilight over a lake
Twilight as viewed from space
Midtown Manhattan during civil twilight, demonstrating blue hour
Civil twilight in a small town in the Mojave Desert