Eulica americana st 30 Lake Merritt, b.d. #, Oakland, Alameda Co. Calif.- where these birds were standing, moving the coots out of their way. The coots showed no aggression towards the other ducks, nor did the ducks make aggressive passes at the coots. Feeding them wheat, the coots seemed more agile in getting the grain than the mallards were. Most if not all of the coots in this population seem to be adult birds- I have seen none out of about 40 that had bills in the least bit mottled. Throwing grain to a flock of water-fowl, including many Mallards, a few Pintails, 1 Black Brant, a pair of coots came out to join the feeding- both ♀ and ♂ calls being given, characteristically, by the small and larger birds. As other coots came into the area to join in the feeding, the two birds of already there tried to keep them away, to the extent that the ♂ was spending most of its time chasing other birds, charging three masses of ducks on several occasions to attack other coots. Once the ♂ attacked the female while she had her head under water feeding, after severely mauling her she was able to give a sound. And he immediately ceased, she just sat there giving a feeding call with her mouth wide open. -A few minutes later two birds were in paired display, one on one side of a fence and the other on the other side. I threw grain to the one on the outside, and the