[Whether it's true or not, you'll only have to test it to find out. Curtis is a nocturnal animal and can see perfectly well at night. But during the day his pupils will shrink to their smallest size possible. This is sufficient proof that he has photophobia. Moreover…]
Muir's eyes swept over the eagle beastmen surrounding him, the muscles all over his body highly tensed as he prepared to fight. [I know how to neutralize his poison.]
At the mention of this, all the eagle beastmen pricked up their ears.
Many of those eagle beastmen who died were scraped by Curtis's teeth. The extent of the physical injury wasn't fatal, but that venom would make sure their death was certain.
If there was a way to neutralize the poison, it would greatly enhance their chances of survival.