Photo of the Week – March 16, 2012

Sandhill cranes have filled the Platte River valley.   They’re in nearly every field within 5 miles (or more) of the river.  Bird watching is pretty easy when you just have to pull over to the side of the road to see a few thousand cranes feeding, dancing, and calling to each other.  It’s a great experience, and widely accessible to anyone with a car and a few extra minutes to pull off the interstate and drive a few county roads.  Sometimes, as was the case this past weekend, there is even a big white crane mixed in with the sandhill cranes – just for a little extra excitement.

On the other hand, while seeing the birds in the fields is fantastic, it pales in comparison to the experience of sitting in a viewing blind on the edge of the river watching the cranes pour out of the sky into their river roost sites in the evening, or sneaking back into the same blind early the next morning to watch them wake up. 

Looking through windows cut in the burlap front of a crane viewing blind along the Central Platte River. The birds were just waking up in the early dawn and starting to get noisy when this photo was taken.

It’s tough to beat an early morning in the blind.  Arriving well before sunrise, it’s usually hard to tell how many birds are on the dark and nearly silent river.  Then, as the light slowly comes up, thousands of silhouettes appear on the water and start to shift around.  As the sun slowly rises, so does the volume of the crane cacophany.  On most mornings, the cranes stick around for an hour or more after the sun is fully up, providing plenty of time to watch and listen to them at close range.  Awesome.

If you’ve never had the experience, what’s stopping you?  You can make reservations through Audubon’s Rowe Sanctuary or the Crane Trust Nature and Visitor Center.  While you’re in the area, stop by and hike one of the trails through our Platte River Prairies.

It’s Spring for Snakes

The temperature topped 80 degrees F today in the Platte River Prairies.  I heard a frog plop into the water as I walked along a wetland edge.  Red-winged blackbirds were defending territories. 

…and apparently red-sided garter snakes were feeling the spring too.

A small mating ball of red-sided garter snakes. Platte River Prairies, Nebraska. Click on the picture for a larger, sharper image - if you dare.

When I first came upon these garter snakes, there were four of them.  As I neared, the writhing mass of snakes separated, and they all started for me like they thought I was going to give them something to eat.  I have no idea what that was about, but it’s a good thing I’m not afraid of snakes!  As I got my camera out of the truck, the snakes scattered, and one went a different direction from the others.  The other three slithered about 10 feet away and then re-formed their mating ball.  I’m assuming the bigger of the three snakes was the female, but it can be hard to tell.

Apparently, even snakes can have a hard time telling males from females in this kind of mating frenzy.  As garter snakes emerge from their winter dens, males come out first and and lie in wait for females.  When a female arrives on the scene it’s mobbed by a group of waiting males and they writhe around together until a pair finally mates.  Just to make things interesting, though, sometimes males can pretend to be females, and can even exude a female pheromone.  It’s not clear why the “she-males” do this, but there are some theories.  Since newly emerging snakes are cold, and thus slow, it may be that she-males are trying to warm up by attracting a “snake blanket”.  Besides the warmth advantage, being in the middle of a big ball of snakes might be good protection from any nearby predator, who is likely to pick off the snakes from the outside of the ball, not the inside.  On the other hand, it seems like a ball of snakes might attract more predators than a single slow-moving cold snake!

It was a great spring day to be outside.  Apparently, the snakes thought so too!