Showing posts with label vernal pool. Show all posts
Showing posts with label vernal pool. Show all posts

Monday, July 7, 2014

Vernal Pools: Spring to Summer

A vernal pool is a place that is wet in the spring. Vernal pools of Pennsylvania are home to many different kinds of creatures, including wood frogs, fairy shrimp, and salamanders.

In the late winter and early spring, vernal pools are filled with many different creatures!

What happens to vernal pools in the summer? They dry up! The salamanders and frogs leave the pools and go into the forest. Look at the same vernal pool in early June compared to early July:


It's fun to walk in the same place in each season to see how it changes. What can you notice?

Wednesday, May 4, 2011

A Special Vernal Pool


A vernal pool is a pool that is wet through the spring, but dries up in the summer. Vernal pools are special habitats. They can be homes to wood frogs, spotted salamanders, and fairy shrimp.

On the last weekend in May, I found an interesting new vernal pool! Can you tell what has happened? The old tree fell over, probably during the winter. In the hole that was left behind, a vernal pool has formed. This pool is nice and shady, perfect for small creatures.

But had any creatures come to this vernal pool? I poked around a bit to find out. There, in the middle of the pool, I saw a baseball-shaped blob of eggs! Salamander or wood frog? They were a little too far away to tell--and I didn't want to reach into the pool to find out.

What was so neat is that this vernal pool had not been here last year. It's brand-new! It just shows how things in the forest are always changing--and when one thing goes away, like the old oak tree, something new can take its place.

Monday, March 21, 2011

Wood Frog Eggs

A trip to the vernal pool yesterday revealed masses of wood frog eggs. These eggs can often be found in vernal pools. Here's what they look like:

Do you see the little black circles? Those will get longer over the next few weeks, and slowly develop into tiny tadpoles that look like this.



Over the rest of the spring, the tadpoles will grow. Eventually they will become tiny froglets.

Wood frogs are pretty common in Pennsylvania. A full-grown wood frog is shown below. Do you notice the robber's mask?