- The Pied-billed Grebe is a common waterbird in southern Arizona, safely spotted year-round in local marshes, ponds, and river backwaters - They are highly adaptable generalists, behaving much like miniature submarines by adjusting their buoyancy to sink slowly out of sight when threatened - While they reside in the region permanently, their numbers swell significantly during the fall and winter months as northern migratory populations arrive - Because southern Arizona consists largely of arid desert, these birds concentrate heavily around any perennial freshwater source with thick emergent vegetation like cattails or reeds - Prime locations to view them include ... = Sweetwater Wetlands (Tucson): This treated water facility features expansive cattail-choked sloughs where Pied-billed Grebes are reliably seen swimming, diving, and occasionally nesting on floating platforms = Canoa Ranch Conservation Park (Green Valley): The main historic pond here hosts a steady population...