This morning as we approached the entrance to Bahia Magdalena (La Entrada), our whale sightings transitioned from breaches and flukes of humpback whales to the mottled backs of gray whales.  As our trusted pilot Sergio Camacho guided National Geographic Sea Lion up the shallow, mangrove-lined channels of Hull Canal, we watched pelicans, herons and shore birds from the bow.  Late in the afternoon we walked across the sand dunes of Isla Magdalena, and admired sand patterns, plants, animal tracks and the empty and vast ocean beach.