Table 2: Sectional Breakdown of Eastern Pacific Grid Bird Populations, 19-24 April, 1967 NORTH SECTION CENTRAL SECTION SOUTH SECTION No. % of Grid % of total birds No. % % B/sq. mi. No. % % B/sq. mi. Species Total in North Section Birds/sq. mi. Black-foot Albatross* 26 67 5.9 .020 13 33 1.7 .010 NOT SURVEYED Laysan Albatross 1 100 .1 .001 Sooty Shearwater 16 89 3.6 .025 2 11 .3 .003 Leach's Storm Petrel 77 63 17.3 .236 37 37 4.7 .115 Red-tailed Tropicbird 2 100 .5 .003 Herring Gull 4 100 .9 .006 Western Gull 4 100 .9 .006 Sabine Gull 2 100 .5 .003 Short-billed Gull 1 100 .2 .002 Pomarine Jaeger 1 100 .2 .002 Long-tailed Jaeger 1 100 .2 .002 Red Phalarope 255 28 57.3 1.560 672 72 90.0 4.175 Black-bellied Plover 1 100 .2 .003 Xantus Murrelet 2 100 .3 .012 Bird sp. 4 100 .5 .006 Small Pterodroma 37 74 8.3 .057 13 26 1.7 .020 Storm Petrel sp. 10 83 2.2 .031 2 17 .3 .006 Shearwater/Petrel 5 100 1.1 .008 Gull sp. 1 100 .2 .002 Jaeger sp. 2 100 .5 .003 TOTALS 445 100.0 1.967 746 99.6 4.348 Total miles 327 322 * The total for the two sections may not agree with the grid total due to an allowance for birds which followed from one section to another.