JPMycors 1975 Journal transects 1,2,3,4,5 24 July (cont) areas - particularly the highly polygonized ones - as this spectrum increases the separation of birds appears to be more cleaner. Thus, melanotus and alpina appear to be utilizing different areas - the peroral in flatter, less polygonized and wetter regions, while the dunlin appear to require some degree of polygonization, and indulge persisting along the ridge (#1) and in some other highly polygonized sites. These patterns should emerge from the more detailed analysis. Yet there are also places where the two species continue to coexist. Apart from the increased resource spectrum available for differentiation, it is also possible that the increased greater mobility of the birds due to now ambulant young, plus the lack of need to remain in suitable nesting habitat (for melanotus) allows the differentiation to emerge. For example, 99 melanotus passed through transect 3, reaching a peak during the 10 day period (beginning 7/15). Now, they appear to be moving further down the gradient into areas which before were normally flooded. I found more peroral 99 to the south of transect 3 this morning, out in the Carey - Erieharven flats, than there were on the transect. This is an area which earlier in the season had been without P melanotus but had considerable #s of P melanotus during the first part of their flocking movements, around the early part of July. Note - just before running #3 I was almost "white-out" in a snow flurry. Perhaps an exaggeration. But what is happening to the surface invertebrate + as a result to foraging cardioper chicks ?? During the afternoon I returned to the transect area, first to biolograph a Phruvialis ditch which was still in the mud but banked, and then to sample micro-habitat foraging preferences. GRID 3 28 July 0900 Negen sampling #3. 100% clouds - a low unpleasant cover w/ light NW wind. Temperature ~ 34°F. Although no pustula appeared on the grid, there were a few individuals in the nearby polygonated area found