Journal 58 R.E.Johnson 1968 May 30 Amchitka Island, Alaska (cont.) of buildings with good nest sites, the figures are considerably below those in the South Hanger area. This simply means that the buildings in areas A & B are in better condition in general & their shelves are still intact [all quonsets had shelves to begin with + these fall after sufficient weathering]. The statistics show that the shelves are more numerous in areas A & B. Visual appraisal confirms that in fact the buildings have been more recently occupied or have suffered less from weathering, etc. Many were boarded up sufficiently to keep wind from blowing threw them to any great extent. The increase in available nest sites did not result in a, [proportionate (i.e., in fact, a decrease occurred)] increase in number of nests suggesting that nest sites are not limiting population size in these areas. Clearly where there are no buildings, off the island, there are no nests + no rosy finches. Prior to WWII rosy finches were no doubt limited to the sea cliffs around the margins of the island. During WWII buildings were built, usually in high densities, & [there was subsequent] the rosy finches subsequently invaded the interior of the island. Apparently these densities exceed that necessary for maximum densities of rosy finches. Perhaps the reason for the decrease in nest frequency per building is related again to maximum density of rosy finches. The