Maken 1959 Hirundo hirundineus June 12 Patimegea Bina Pair flew by me heading down river at 7.04. June 15 Saw 3 males + one female on river in evening - a male upstream from camp. Two males landed. were joined by a male + female - made courting until the males male established the order of things then quieted down. All 4 swam & gravel bar + rested at edge of water. June 20 177 + 299 were seen flying along ocean shore past the delta. A little later 397+ 299 were seen flying down river. Aug 7 7 harlequins in delta. Flushed up & flew over ocean. All were dark brown with 2 white spots on head, one (large) at base of bill before eye, one smaller, & brighter behind eye. 9's according & Peterson.