ENVIRONMENT: CALIFORNIA LEAST TERN

Orange County breeding populations and fledgling success of the endangered California Least Tern.

Estimated Number of Pairs

Colony 1978 1979 1980 1981 1982 Anaheim Bay 0 6 38-43 40-45 17-20 Huntington Beach 75-90 80-95 70-90 105-120 85-111 State Park Bolsa Chica (North) 0 15-20 20-26 31-54 70-92 Bolsa Chica (South) 0 19-23 NA 19-21 8-10 Upper Newport Bay 8-10 6-7 2-5 0 0 County Totals 83-100 126-151 130-164 195-240 180-233 State Totals 776-887 845-1049 890-1215 963-1171 1015-1245

Colony 1983 1984 1985 1986 Anaheim Bay 4 21-22 20 49 Huntington Beach 85-91 68-72 45 53 State Park Bolsa Chica (North) 110-116 82-83 96 60 Bolsa Chica (South) 25-30 18-22 22 10 Upper Newport Bay 9 6 0 13-18 County Totals 233-250 195-205 183 185 State Totals 1201-1326 931-1001 1019 NA

Estimated Minimum Number of Fledglings

Colony 1978 1979 1980 1981 1982 1983 Anaheim Bay 0 0 24 20 2 2 Huntington Beach 100 90 85 168 50 60 State Park Bolsa Chica (North) 0 3 15 20 70 35 Bolsa Chica (South) 0 3 0 0 5 10 Upper Newport Bay 0 0 0 0 0 2 County Totals 100 96 124 208 127 109 State Totals 418 650-742 745-793 826-830 469-553 874-919

Colony 1984 1985 1986 Anaheim Bay 33 3 70 Huntington Beach 20 42 10 State Park Bolsa Chica (North) 40 65 76 Bolsa Chica (South) 10 0 NA Upper Newport Bay 0 0 9 County Totals 103 110 165 State Totals 510-527 607-701 NA

NA: not available

Source: U.S. Fish and Wildlife Service