Hamilton 1967 Journal July 24 Virrilas Estuary, 35 km SSE Sechura, Dept. Piura, Peru. Elev. 50'. Wilson's Storm Petrel Oceanites oceanicus and sooty shearwater, Puffinus griseus. They were flying in so close that I never able to shoot 4 from afar. We got on boat Skamata, On Wilson's Storm Petrol as two White-rusted Storm Petrels, Oceanites gracilis. We then proceeded to watch O'Aininturis that we thought was another Wilson's Storm Petrel but the now White-vested Storm Petrels. They were very difficult to tell apart under field conditions. We then proceeded to make a stop began diving away stepping on mollusks at the more which was quite low and it went to its low tide. We saw many species but light was poor as 2 in A b man of all of them. On addition to these matters about the were Red-billed Tumb, Buteo polyosoma, American Oystercatcher, Haematopus palliatus, Black-bellied Plover, Pluvialis squatarola, Semipalmated Plover Charadrius semipalmatus, Snowy Plover, Charadrius alexandrinus, Audubon Turnstone, Arenaria interpres, Greater Yellowlegs, Tringa melanoleuca, Willet Catoptrophorus semipalmatus, Baird's Sandpiper, Calidris bairdii, Semipalmated Sandpiper, Calidris pusilla, Western Sandpiper Calidris mauri, Sanderling, Calidris alba. Whimbrel, Numenius phaeopus, Common Dowitcher, Limnodromus griseus, Chilean Flamingo, Phoenicopterus chilensis and Coastal miner Geositta peruviana. About 1630 we at least two spring Terns were present but I couldn't identify them. About 1630 we returned to camp. Toro Toro Pt. 5 Km SE Bayavarz, Dept. Piura, Peru. Elev. 100'. When we returned we went out into rocks in hopes of catching last, after removing grouted from it. A worker clothed by a magpie. after supper I put on White-vested Storm Petrel, Oceanites gracilis.