Smells human fear + vamps hard to track

“You don’t think we’ve missed all the fighting?” Zula asked.
“Not by a long shot,” Yebba said. “I smell human fear in the air. That
way.” He pointed west. “And there.” East. “They mean to clash again and
they know many more will die when they do.”

Although Larten could smell the soldiers, he wasn’t able to pinpoint the
scent of fear. But Yebba was fifteen years older and had been blooded when
he was only thirteen. A vampire’s senses improved for most of their first
hundred years.

The sharp-nosed Yebba led the way as they homed in on their kin.
Vampires were harder to track than humans. If Larten hadn’t known there
were others present, he probably wouldn’t have noted the subtle traces of
their smell in the air.

They found the war pack resting beneath a massive, leafy tree. There
were eight of them, a couple younger than Larten, the rest the same age as
him or older.

***

The Saga of Larten Crepsley: Ocean of Blood, Chapter 4