Mayhew 1952 Feb. 15 Sand hill Crane 4 mi. S.E. of Thornton, San Joaquin Co., Calif. South, so that the total number seen today has been at least 500 birds. At 10:45 A.M. a large flock to the south arose with an enormous amount of calling, which caused all the cranes within hearing distance to get in the air and add their bit to the commotion. Shortly, most of the birds settled in an open field & birds continued to come in from all sides and join the group. There were easily over 1000 birds in the air and settling on the ground. When we left the area at 2:20 P.M., most of the birds were still standing in the middle of the large open pasture where we first found the largest groups.