9 Five of the six sooties were seen in the western sections (unusual). Densities have dropped since April. Cooks Petrel (Pterodroma cooki) # Obs. Track Nontrack Total # Collected 56 0 56 - 0 - 0 + + Ninety-four percent of the cooks were in the south section, predomi- nantly in the western half. Since the southern sections have not been fully covered since early April it is possible that this species has been in the Grid for some time, but I think not. The birds were all flying in a north or northwest direction and appeared regularly crossing the ship's bow. This may be part of the populations observed off Southern Baja on EAC 13 in early June, just now reaching this latitude. The direction of travel could bring many birds off to the west of the Grid area before reaching 35° N. Birds were observed as singles and pairs, occasionally on the water. White-rumped Storm Petrel # Obs. Track Nontrack Total Dark-rumped Storm Petrel # Obs. 17 4 21 Storm Petrel sp. # Obs. 58 81 139 Total 155 86 241 - 1 (All Storm Petrel track) - + Over 46 percent of all Grid birds were Storm Petrels. While only some 9 percent of the total were recorded as dark-rumped, or all dark, the proportion was probably at least two times that; the lack of a white- rump being more difficult to ascertain than its presence. Distant or dubious birds were logged as "Storm Petrel sp." and doubtless include more dark birds than light. Unfavorable weather limited collecting and the subspecies present are not known. In addition to the dark form (5), 2 white-rumped forms may be present. Several large-appearing birds with broad white rumps were seen in contrast to smaller birds with more re- stricted white. Birds were very abundant around Point Dogwood (linear density ca. 10.0 birds/mile) and common in the southeast section (linear density ca. 1.2 birds/mile). Ninety percent of the Storm Petrels were seen in the eastern section. On 23 July a dark-rumped bird with an ob- ject (Food ?) in its bill was noted being harassed by a white-rumped bird 125-150 feet above the water. They fluttered together for several seconds at that height, then returned to the surface and disappeared, the dark-rumped bird still possessing the object. I have not observed any phase of this sequence (except mutual fluttering) before. The height was exceptional; the wind speed was ca. 5 knots.