Which term describes animals that are active during twilight or at sunrise?

The term that describes animals that are active during twilight or at sunrise is "crepuscular." Crepuscular animals are specifically adapted to thrive in the low light conditions present during dawn and dusk. This behavior is often a survival strategy, allowing them to avoid predators and to take advantage of the activity patterns of their prey that may also be more active at these times.

Nocturnal animals, in contrast, are those that are primarily active during the night and rest during the day, while diurnal animals are active during the day and sleep at night. The term matinal is less commonly used but generally refers to activity in the morning; however, it does not specifically denote the twilight periods that crepuscular captures. Therefore, crepuscular is the most accurate term for animals that are particularly active during these transitional times of day.