What is the term for animals active at dawn and dusk?

In zoology, a crepuscular animal is one that is active primarily during the twilight period: being matutinal, vespertine/vespertinal, or both. This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daytime and of night, respectively. Some crepuscular animals may also be active by moonlight or during an overcast day, under lower-light conditions.