Chiapas and Oaxaca, Mexico July 2015
From July 11-23, 2015, Sheridan and I spent four days in the central Chiapas area as part of the GBNA biennial meeting, and then a week in south/central Oaxaca as part of a private group, ably organized and lead by Michael Retter.
Three of the 40+ Galapagos Shearwaters Puffinus subalaris seen from the boat on our Pelagic out of Huatulco, Oaxaca. The only other species of shearwater was one light-morph Wedge-tailed Shearwater that did a close but brief fly-by.
3) Note how from this angle, it can seem as though there is a Townsend's/Manx-like dark bulge between the head and the wings: