- 3 - dispersion of this group (see above) taken in account with the fact that no birds were seen in the central and southern portions of the grid suggests the possibility that some distribution change may be underway. On the other hand, the east-west distribution remains virtually unchanged from last month. One dark phase bird was collected. There appeared no advance of gonad breeding condition compared to specimens from earlier cruises. Fork-tailed Petrel (Oceanodroma furcata) 17 The increase over last month is probably due to differences in areas sampled. Compared to January, there appears to have been a density shift from the central to the northern section of the grid. Leach's Storm Petrel (Oceanodroma leucorhoa) 90 +2 nocturnal The higher number observed over last cruise is probably due to the better observation conditions during this cruise. North-south density-distribution remains virtually unchanged, while east-west distribution would appear to have reversed since last cruise. This is probably as a result in differences of areas surveyed during daylight and also due to weather variations. Two specimens were collected; neither showed advanced gonad condition. In addition to 90 Leach's, most of the 19 birds identified only as storm petrel species were probably Leach's. Red-tailed Tropicbird (Phaethon rubricauda) 2 +l nocturnal All three birds were in adult plumage, and all were single sightings. These records, combined with those of last cruise, would suggest that the grid area is included in the normal range for this species despite its formerly unrecorded presence in this part of the pacific. All three sightings were in the southern third of the grid. None were collected.