Mayhew 1950 Mallard 22. March 6 Conaway Ranch, 2 miles east of Woodland, Yolo Co., Calif. Two more pair were flushed from the large drainage ditch. Mar. 12 2 pair were flushed from the big drainage ditch. They had been loafing together, & took off as a group. However, once in the air, they split up as 2 definite pair, with the ♀ leading in each case, & disappeared to the south. About 200 yards farther east another pair were flushed. They flew about ½ mile farther east & landed in a rice stubble field. In a ditch along the north-west corner of section 20 , 8 pair were seen. 7 of the pair were grouped along the ditch for about 50 yards. About 150 yards farther on the 8th pair were seen. As I approached, 4 pair took off together, a few minutes later another pair took off, then 2 more pair flew away, & finally the most distant pair flew away. In every case the birds disappeared to the south. There was no doubt in my mind that all of these birds were paired, because I watched their actions with binoculars before they flew away, & although they formed a loose group, each ♂ was swimming very close to a ♀. About 300 yards farther down the ditch 2 pair & a lone ♂ were seen swimming. They all flushed at the same time & started off towards the south together, but the group broke up very shortly, with the 2 ♀ +