Bonin Island Petrel This bird is poorly represented in the grid area in the spring, only two individuals having been seen in April and four in March. The two in April were seen at the southern end of the grid. Dark-rumped Petrel Seventeen individuals of this species were seen in April, almost twice as many as in March. Four of these were seen near the main Hawaiian Islands, while the remaining thirteen were seen at the southern end of the grid area. White-necked Petrel Only three birds of this species were seen in April compared with nine seen in March. All three were seen at the southern end of the area. Harcourt's Storm Petrel Numbers of this species increased 11% from 59 in March to 129 in April. This species was quite evenly distributed throughout the entire grid area. Considering that the numbers of storm petrels seen this month is roughly the same as the numbers of Wedgetail Shearwaters exclusive of flocks, it seems strange that no nesting sites have been located in the Hawaiian Islands. Several birds of this species were attracted to an oil slick of vegetable oil less than 15 minutes from the time the slick was formed. Presumably fish oil would attract them even better.