<P> Crepuscular animals are those that are active primarily during twilight ( that is , the periods of dawn and dusk ) . This is distinguished from diurnal and nocturnal behavior , where an animal is active during the hours of daylight or the hours of darkness , respectively . The term is not precise , however , as some crepuscular animals may also be active on a moonlit night or during an overcast day . The term matutinal is used for animals that are active only before sunrise , and vespertine for those active only after sunset . </P>
animals that are active at dawn and dusk
Crepuscular animals