According to the Department of Education 180 is the minimum number of instructional days California requires of its public schools. The 180 days doesn`t include in-service days for teachers.
Loon, Arctic also Black-throated Loon also Black-Throated Diver Gavia arctica Found: North America (Alaska), Europe, Asia. The Arctic Loon has white underparts. Breeding has black back with white bars; black face; black sides of throat with white stripes; dark green throat.
Loon is a carnivore (meat-eater). Its diet is based on fish (such as gulf menhaden, perch, trout), crabs, lobsters, shrimps, mollusks and insects. Natural enemies of loons are gulls, ravens, crows, turtles, raccoons, otters, skunks and weasels. Loon is solitary bird. It occasionally gathers in small groups (of up to 20 birds) during the summer and autumn. Loons produce yodel calls to announce occupation of a territory during the breeding season. Tremolo calls (which sound like maniacal laughter) are sign of aggression.