White-tailed Tropicbird Three of the eight seen in April were within 20 miles of Kauai. The rest were distributed randomly over the area. Blue-faced Booby One of the five seen this month was at 17° N; the others were at the extreme southern end of the area, where most of the birds of this species have been seen. Numbers were consistent with past months. Brown Booby Five birds were seen in a feeding flock just 10 miles north of Oahu on 30 April. Red-footed Booby Only one of the 46 seen in April was more than 50 miles from Oahu. It was an immature which came aboard at 18°N during the day. It was banded, notes were taken on its plumage and soft part colors, and it was released. Great Frigatebird Out of 26 birds 16 were seen within 100 miles of the high Hawaiian Islands this month. All were within 300 miles of land. Larger numbers of Frigates have been seen in the past two months (19, 26) than in 1964 (4, 2). The difference is felt to be significant, but no explanation is readily forthcoming. Arctic Tern (?) Twenty-seven birds probably Arctic Terns but possibly common Terns were observed heading north, usually in groups of two, in April. A similar northward migration was noted in April 1964. The birds were seen often to