J. Reimer 1948 Journal 26. May Bay Farm Island, Alameda Co., Calif. 20. Brewer Blackbird - common 21. Long-billed Dowitcher - 6 22. Semi-palmated Plover - dozen 23. Western Sandpiper-abundant 24. Redwing Blackbirds nesting in sedges on golf course. 25. ♀ Mallard with young ducklings among sedges. Great diversity in bill shapes of shore-birds. Sandpipers bill short and straight can only feed in shallow water and only directly in front if feed. Dowitcher and legs long and straight; can feed in different deeper water and somewhat farther in front if feet. Curlew, bill long, down-curved; can feed much farther in front if feet. Godwit, bill long, up-curved; can feed for in front 1 foot and shovel along just beneath surface. All these adaptations may be factors which prevent direct interspecific competition. Such competition would be exceedingly important and vital if it did exist since all species necessarily must feed at water's edge. Lack of competition probably valid since no animosity apparent interspecifically Species said to group more when