Flat Stanley and Flat Hal saw the Great Frigatebird flying and playing near the pier in Pago Pago

Watching these birds in flight was positively delightful.  There were times they were gliding on the wind, having positioned their wings such that they were almost impossible to find against the water, as if they were blending in with it.

We found an informative webpage about them at: https://www.allaboutbirds.org/guide/Magnificent_Frigatebird/lifehistory and are sure there are other sites with still more information.