Right, but presumably sensing of magnetic cell clusters developed in one location first, probably the beak because that wouldn’t require specific pigmentation patterns. Then that structure was duplicated in the eye and developed pigments. It’s possible the genes originally came from horizontal gene transfer, maybe an endosymbiont.
Signals coming from mechanoreceptors doesn’t mean they’re perceived as a “tactile sense”. Different senses produce nerve impulses the same way; they’re just interpreted differently.
Right, but presumably sensing of magnetic cell clusters developed in one location first, probably the beak because that wouldn’t require specific pigmentation patterns. Then that structure was duplicated in the eye and developed pigments. It’s possible the genes originally came from horizontal gene transfer, maybe an endosymbiont.
Signals coming from mechanoreceptors doesn’t mean they’re perceived as a “tactile sense”. Different senses produce nerve impulses the same way; they’re just interpreted differently.