ADD: I sw dog swimming TV.: alternate, both front and back legs!!! 2--06
The placental Eutheria exhibit the four major CR modes.
Alternate symmetrical walking and running or climbing are universal in all families except the fully
aquatic carnivores. Weasel and otter swim this way at the surface.
Vampire bats on the ground walk on four feet. It also appears as simple body-tail
undulation with no leg action in weasels and otters
swimming underwater in beavers swimming at the
Alternating asymmetry occurs in dog paddle with the forelimbs as in
dogs, bears and...?, in the forelimb excavation of burrowing
moles and in human (or primate) bicycle riding. Bats
moving upside down on trees or cave ceilings move about with alternating legs.
Bipedal walk and run also belongs to this mode. So does brachiation, which is a primate arm action, but which shows a degree of miminal coordianted movement in the legs as they hang.
Rats and mice swim in a special manner, holding the forelimbs under the chin, and alternately paddling with the legs.
Beavers show the same behavior when swimming at the surface.
Parallel symmetry is shared by all quadrupes that move by bounding, like the Lagomorph rabbits and hares, quadruped primates, undulates, galloping undulates, canids, felids, etc.
Jumping in primates, bats, gliders (gliding squirrels, colugo), human (primate) breast stroke swim, prey capture by fishing bats, as well as beaver rapid swimming with synchronous hind limb strokes also belong here.
Parallel asymmetry is shown by sea lion swimimg with forelimb strokes, aerial flight of bats, forelimb powered burrowing of
moles, display scratching of tree trunks, etc. by felid, canid ursine, (and other?) carnivores, and the bipedal ricocheting or
hopping of the kangaroo rat (Hetromydae), the rats and mice (Muridae), spring hare (Pedetidae), jerboa (Dipodidae), hopping mice (Genus Notomys).
Beavers swimming fast underwater use parallel hind leg and synchronized tail strokes.
Pinniepds no imcluded yet - needs more looking up!!!