At Spindle Hills, Arthur had two bounties he needed to do. First was the Twin Tailed Lizards and the second was the Hammer Head Oxes.
He was the most interested in the first one, but wouldn't mind if he discovered the Hammer Head Oxes at the same time as well. Regardless of when he encountered them, the result would be the same.
"Can you smell them Brambles?" Arthur questioned. "Or any other creatures?"
Other than the two beasts Arthur was hunting, there were several more mobs that were present in the Spindle hills, with one of them being particularly annoying.
"KIHI!" Brambles responded almost immediately, having smelled them.
~CAW~
"Of course it's those birds." Arthur didn't even need to hear Bramble's response as he heard the cry of the enemies.