...-altitude lineages of ducks. High-altitude adaptation Hypoxic ventilatory response Ventilatory acclimatization to hypoxia Haemoglobin Waterfowl The air at high altitude is both cold and hypoxic. These conditions challenge the ability of birds and mammals to adequately match O 2 supply...

... that alter the work of breathing, we studied 11 species of waterfowl: five from high altitudes (>3000 m) in Perú, and six from low altitudes in Oregon, USA. Birds were anesthetized and mechanically ventilated in sternal recumbency with known tidal volumes and breathing frequencies. The work done...

... 2004 thermoregulation swimming mallard Anas platyrhynchos down waterfowl metabolism feather Ducklings go to the water and swim while downy. This behavior is interesting because the available data indicate that down is much less resistant to wetting than contour feathers( Nye, 1964...