Targovi

Targovi the Tigery is not just a male humanoid with feline facial features. When following a human being, he loses sight of her but his

"...tendrils picked the faint traces of her individual scent-complex out of the air. Yes, she was definitely bound for the field."
-Poul Anderson, Flandry's Legacy (New York, 2012), pp. 359-360.

We know of animals that can follow scents but Targovi is an intelligent being with that ability and:

"...his tendrils picked up vibrations too..." (p.361)

When those whom he is following hear him moving through the bushes beside the road and stop to investigate, he bounds up the nearest tree faster than a human being could have done it. He has strength, agility, reaction time and claws. These also enable him to leap above their heads, then cling to and blend with another tree ahead of them.

There are other interesting background details in this chapter:

we already knew of the turf roads between the trees of the Cynthian town of Lulach but now we are additionally told that they are "...genetically engineered to kill any invading growth" (p. 360);

we are also told that native animals are often heard but are not hunted because they cannot be eaten and do not eat crops so there is, effectively, peaceful coexistence between native animals and colonists.

It would have been very easy for an sf writer simply to state that his characters were on another planetary surface and to leave it at that but Anderson makes each new planet a real and different place down to details like what grows there instead of grass:

"Long green blades rustled under a slow breeze. They resembled grass, but were not." (p. 354)