As a follow up on my theory about visual alignment I have added a topic about the pupil shapes of Frogs & Toads, they come in all kinds of shapes:
* Round
* Vertical
* Horizontal
* Heart-Shaped (Oriental fire-bellied Toads)
Frogs & Toads are hunters who eat small instects such as fly’s, fast moving targets, so they need a pricise tracking system. Just like cats who catch mice and birds (quick moving objects), their pupils become line shape when they have to focus.
The group with Heart-Shaped pupils is interesting when it come to alignment, when we closely look at the skin-pattern of “Oriental fire-bellied Toads” we can see that they have direction lines on the front of their beak/belly.
See illustrated presentation: http://www.sharp-sighted.org/index.php?option=com_content&task=view&id=90&Itemid=160
Conclusion: This Fire pattern works as a clock-like alignment-system that helps as a precise hold-on for the Toad’s view to catch insects.
