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 Mar., 1908 SOME NOTES ON THE GREAT BLUE HERON 79 fiejohn happened to be hunting Clapper Rails' eggs when he stumbled upon the new heron colony, away out on the marsh, and fiat upon the ground. In May, 1903, the writers made a flying visit to this interesting heron colony and determined to visit it at some later date with the purpose of making a study of the colony. Early in the morning of April 14, 1907, we got into a row boat at Redwood City and commenced a four mile row, following the winding sloughs. Many shore and marsh birds were surprised. At this date most of the waders and sandpipers were in flocks preparatory to their migration. Among the birds seen were Arumenius 1ongirostris, Syruphernia semipalmata inornata, Ereuntes occidentalis, t?allus obsoletus, gVycticorax ncvvius, Calidris arenavia, 3Ierganser serratot, Arenavia melanocephala, Melospiza pusillula, several species of ducks and a few gulls. An occasional solitary Blue Heron flying overhead kept us reminded of our A CORNER IN THE TERRESTRIAL COLONY OF GREAT BLUE HERONSi YOUNGSTERS IN WADING quest and tho rowing was tiresome we kept at it. Soon the slough connected with a large open channd and the Bay itself was seen. Thinking we must be near the colony, we landed on the bank and saw it to be about a half-mile further on. Herons were arriving and departing from all directions, and with our glass we could see some 50 or 60 herons standing around. Resuming rowing we made for a landing place within one4ourth mile of the colony and another peep was taken from the bank. This time a new scene was displayed. The Herons had seen our approach and no flying birds were evident, while those which were at the colony before, were now walking stealthily away. Wishing to get a photograph of the flock of birds we rowed rapidly toward them, and altho completely hidden from the birds while rowing, when we made our final landing the birds had moved a considerable distance away, too far to photograph. As soon as we stood out on the marsh land and took a few steps toward the flock,