I have often been surprised at the great diversity of nesting sites, even in the same colony, it being not an unusual occurrence to find nests entirely surrounded by water--little islands of mud and sticks often built up out of water several inches deep. Not less common are the platforms of dried grass placed just at the water's edge, or the slight excavations that, killdeerlike, are placed on the bare ground a hundred yards or more from the nearest water. In one colony the majority of the nests were built on a levee that extended through the pond and were so near the waters edge that, although most of the nests were quite elaborate platforms of dry grass and twigs, the lower parts of the eggs were wet. Undoubtedly a high wind would have caused the wavelets to break over the levee. At this same place there were several nests far out on the open dry ground without even a spear of grass for concealment or protection, and with hardly a vestige of nesting material under the eggs. At one pond where two pairs had taken up summer quarters there was one nest on the bare black ground where the white breast of the sitting female was the most conspicuous object imaginable and could be seen at a glance from a distance of three or four hundred feet. In direct contrast was the other nest; for it was artfully hidden among rather rank salt grass some distance from the pond, and when the sitting bird flattened herself upon it, as is the custom of this species when endeavoring to escape observation, she might have readily been overlooked from any near-by point. The actions of different pairs of stilts when their nesting colonies are invaded are also variable. Sometimes a flock of noisy screeching birds will press close about the intruder, some hanging in the air on rapidly beating wings, others bouncing along the ground by leaps and bounds, raising and lowering their wings continually; while others go through every conceivable motion both on the ground and in the air. It seems that the larger the colony the more demonstrative the birds are; for in several instances where only one or two pairs were breeding the female would sneak from the nest in a guilty manner and quietly join her mate on the opposite side of the pond, where they would remain almost motionless or feed nervously along the margin of the pond.