Interrelated Design in the Swiftlet
Australian Swiftlets use a unique incubation strategy where the first homeothermic nestling incubates a second single-egg clutch, hatching just after the first fledges, maximizing productivity despite limited food. They echolocate to navigate caves, nesting strategically to avoid predators, and build saliva-based nests. Their wings, with stiff feathers and unique aerodynamics, enable all-day flight and high maneuverability. These integrated, precise adaptations suggest intelligent design by a Creator.