Hiding in plain sight, this is a juvenile lacking the purple forehead of adults. It certainly blends well into the background. This species reportedly tends to forage from the inside of the trees making them difficult to spot. Unfortunately this Mariana endemic has suffered steep declines and is now classified as endangered. The population on Guam is now extinct as a consequence of the introduction of the Brown Tree Snake (Boiga irregularis). Unfortunately the Brown Tree-Snake has started invading Saipan. An active trapping program has been implemented to keep the snakes at bay, but the future of native birds on Saipan is questionable unless the snake can be effectively controlled or eradicated. Canon PowerShot SX60.
References:
Baptista, L.F., Trail, P.W., Horblit, H.M., Boesman, P. & Garcia, E.F.J. (2019). Mariana Fruit-dove (Ptilinopus roseicapilla). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/54332 on 26 October 2019).
BirdLife International 2016. Ptilinopus roseicapilla. The IUCN Red List of Threatened Species 2016: e.T22691435A93312366. Downloaded on 25 October 2019.
Cibois, A., Thibault, J.C., Bonillo, C., Filardi, C.E., Watling, D. & Pasquet, E. (2014) Phylogeny and biogeography of the fruit doves (Aves: Columbidae). Mol. Phylogenet. Evol. 70: 442–453.
Goodwin, D. (1983) Pigeons and Doves of the World. Cornell Univ. Press.
Pratt, H.D., Bruner, P., and Berrett, D.G. (1987) A Field Guide to the Birds of Hawaii and the Tropical Pacific. Princeton University Press