December 1964 - BCF cruise Black-footed Albatross A slight increase in numbers was noted in December with 55 seen compared with 40 in November. The southern limit was 22° North in the eastern part of the grid and 21° North in the west around Oahu. On one occasion formal display behavior was noticed between two birds sitting on the water, including all phases of display except bill-clapping. Vocalizations were plainly audible to the observers on shipboard at least 100 yards distant. On 18 December a banded bird was observed sitting near the stem of the ship, but it could not be captured. Wedge-tailed Shearwater Numbers decreased 47°/o from 199 in November to 106 in December. No southern dark-phase birds were observed in the area. This is the first month in which no dark-phase birds were seen. Juvenile birds were seen only on 8 December, just north of Hawaii. As in the past densities were greatest in the vicinity of the high Hawaiian Islands and in the southeastern corner of the area. Christmas Island Shearwater One was observed on 20 December for several minutes within 5 miles of Oahu. Newell's Shearwater Four birds were seen in December, the same number as in November. Two were seen several hundred miles north of the high Hawaiian Islands,