“From a perch, it walks into the water and deliberately submerges, but it cannot defy the laws of specific gravity and walk along the bottom. Undoubtedly when entering the water, it grips with its strong feet, but the method of progression beneath the surface is by swimming, using the wings effectively for “flying” under water. It holds itself down by muscular exertion, with its head well down and its body oblique, its course beneath the surface often revealed by a line of rising bubbles.”
I’m surprised they have negative bouyancy with all that trapped air in their feathers.
“From a perch, it walks into the water and deliberately submerges, but it cannot defy the laws of specific gravity and walk along the bottom. Undoubtedly when entering the water, it grips with its strong feet, but the method of progression beneath the surface is by swimming, using the wings effectively for “flying” under water. It holds itself down by muscular exertion, with its head well down and its body oblique, its course beneath the surface often revealed by a line of rising bubbles.”
That’s molten lead. Such is their dedication to fishing…