Birds from Guam, Rota, and Tinian exhibit no conspicuous differences. _P. roseicapillus_ is closest to _P. regina_ of southern Papua, Lesser Sunda Islands, and Australia being, according to Ripley and Birckhead (1942:3), "Similar to _regina_, but crown and abdominal band darker; malar apex concolorous with crown; hind neck more grayish; tail-bar wider and paler." _Measurements._--Measurements of _P. roseicapillus_ are presented in table 26. _Weights._--In 1948 (1948:59) I listed the weights of 14 adult males as 81-103 (90), of 4 adult females as 85-99 (92), and of one nestling in post natal molt as 44 grams. These were taken at Guam. _Specimens examined._--Total number, 43 (32 males, 10 females, 1 unsexed), as follows: Mariana Islands, USNM--Guam, 28 (March 8, May 25, 27, June 3, 12, 14, July 2, 6, 10, 18, 19, 29, Aug. 21)--Rota, 3 (Oct. 28, 31, Nov. 2)--Tinian, 1 (Oct. 26); AMNH--Guam, 8 (Aug.)--Tinian, 3 (Sept.). TABLE 26. MEASUREMENTS OF _Ptilinopus roseicapillus_ =================+===============+============+==============+=========== | | | Exposed | NUMBER | Wing | Tail | culmen | Tarsus -----------------+---------------+------------+--------------+-------------- 32 adult males | 127 (122-133) | 80 (75-84) | 14 (13-15.3) | 25 (24-27) 10 adult females | 124 (121-130) | 76 (75-79) | 13 (12-13.7) | 24 (22-25.5) -----------------+---------------+------------+--------------+-------------- _Nesting._--At Guam, I obtained records of nests of fruit doves on March 1, 1927, and May 7, 1945. David H. Johnson observed a pair of fruit doves in the act of copulation on May 26, 1945. Birds with enlarged gonads were taken by the NAMRU2 party in March and July. A nestling in post natal molt, just beginning to fly, was taken on July 6. Seale (1901:39) reports two nests, each containing one white egg, taken in the period from May to July. These nests were found in trees eight to ten feet above the ground. _Food habits._--The Marianas Fruit Dove feeds on fruits and seeds of trees and shrubs. The birds are apparently strictly tree dwellers; I saw no birds on the ground. A favorite fruit is that of a flowering shrub known as the "ink berry." Birds were collected which contained stomachs full of these small black berries. The fruit of the papaya is also a favorite food.