At this time of year he is also looking for females to mate, like the skunk!
Nocturnal animals can see a LOT better than
we can at night because:
1) Their retinas are packed with Rods and have few Cones.
Human eyes have way more Cones than Rods.
Rods can sense very dim light, but no color. This gives them better
perception of edges, movement, and silhouettes in dim light.
Cones account for color vision, but only in bright focused light.
Some animals do see some colors, but most, even in daylight,
only see shades of black & white.
2) Unlike humans, most nocturnal animals also have a mirror like layer,
the tapetum, behind their retina. This reflects light back through
the retina, and enhances their night vision.
3) Nocturnal animals have wider pupils, than humans, that lets in more light!
The river is racing along!
What do fish do to keep from being swept downstream?
What do fish eat in the winter?
Do River Otters move to streams for the winter?
Check back next week for the answers!
No comments:
Post a Comment