As our tour group admired the saltwater lagoon, a community of Galápagos mockingbirds scurried and hopped along the water’s edge in search of food. These birds breed in a group of two to five adults, often protected by an alpha male. Presumably, this was him on the left playing kissy-bill with an attractive female. Suddenly, an interloper boldly ran up to the pair and raised his tail feathers in defiance. This was obvious trouble.