Damu the Greater Angle-Winged Katydid!

A few months ago, I looked up at the dorm room wall and there was a katydid perched there!  I captured him and put him in a container for a week!  I learned a little bit about katydids, so put your listening ears on!

Damu in his container.  "Damu" means "blood" in Swahili, and for good reason.  This little insect was a bloodthirsty demon, I tell you what.  Which is a joke because it eats leaves.  Ha.

I figured out that Damu was probably a greater angle-winged katydid (Microcentrum rhombifolium), native to the southwestern and eastern United States.  The adults are only around from between July and October, except in Florida, where the higher year round temperatures allow the species to live year round.

The greater angle-wing is pretty large as insects go (especially here in Colorado), and looks quite cool!  As you can probably tell from the picture below, the katydid has evolved to superbly mimic its surroundings: i.e., the leaves of trees!  This makes the katydid one of my Top Ten Favorite Camouflagers, one of four insects to make the cut!

Top Ten Favorite Camouflagers
By Zack Neher

1.  Octopus
2.  Walking Leaves
3.  Leafy Sea Dragon
4.  Katydid
5.  Ghost Mantis
6.  Harry Potter Under the Invisiblity Cloak
7.  Arctic Fox
8.  Walking Stick
9.  Optimus Prime
10.  Ptarmigan
11.  Leaf-Tailed Gecko


If you live in much of the United States (refer to the map below), you can probably see the greater angle-winged katydid!  Or, at least, hear it!  I know for me personally, once I knew what I was listening to, I heard them ALL the time!  Click the link to hear a sound clip of the male making its distinctive clicking sound!  (Damu made these sounds, which is why I am almost positive of him being a male).

Male Katydid Clicking Sounds

Damu is sadly no longer with us: I kept him for about a week, and decided to let him go.  He spent a lot of time making his clicking sounds (which are surprisingly loud for a critter of his size), especially at night when we were trying to sleep.  It got quite annoying, and I wanted him to be free, so I released him from his prison.  Plus he pooped WAY more than an insect of his size should.

I caught another katydid later on, this time a female.  You could tell that Damu Mbili (Damu II in Swahili) was a female because she never clicked and had an ovipositor, an organ possessed by some animals to aid in egg laying.  She died in the middle of October, right around when you would expect these katydids to pass away, though I did hear male katydids clicking away intermittently through the 27th of October.  Here are a few pictures.

Check back soon for our next post, where we look at some insects that I saw at my recent visit to the San Diego Zoo, many of which are expert camouflagers!

Works Referenced:

The Quarry: Dinosaur Road Trip With Grace Part 4

PREVIOUSLY, ON BATTLESTAR GALACTICA:

-Grace Albers and I are taking a trip down to Dinosaur National Monument in Utah and Colorado.
-We checked out some cool petroglyphs and then camped the night.
-We arrived at the quarry.
-And now....

Before we begin, I am going to upload two pictures of dinosaur skeletons that may be useful throughout this post.  The first is the sauropod dinosaur Camarasaurus, and the second is the stegosaur Stegosaurus.  When you see the labeled bones of two other sauropods called Diplodocus and Apatosaurus, you can refer to the Camarasaurus skeleton diagram below.  

A sidelong shot of the quarry face!

Pyg takes a look at the quarry face!

The vast jumble of bones from all sorts of different animals and dinosaurs is thought to be the result of the death of various animals upstream, and then their bones being washed together!  This explains why most of the bones at the quarry are disarticulated (or not fossilized next to each other like they would look like in real life), and are miscellaneous bones from such a wide assortment of creatures!

Bones aren't the only things that are found at the quarry, however!  Here are two pictures of fossil wood!

Pyg takes another look at the quarry face!  You can see the first fossilized log right above her head in the picture.

Remember before, when we mentioned most bones at the quarry are disarticulated?  Well, there are some bones that are articulated, most of which are part of the vertebral columns of various animals.  This looks like the tail vertebrae of something!

An articulated leg, possibly of a Stegosaurus.

A pair of femora belonging to something!

Looks like a rib bone to me!

An assortment of more bones.

Most of what would be considered the "cool fossils" (like skulls and claws) have been removed from the quarry.  According to Dinosaur National Monuments website, the only two skulls that remain belong to Camarasaurus: here is one of those skulls!

I can't identify most of the bones that I see in these pictures, but fortunately the monument sells a guide for a dollar which we bought.  Although the guide doesn't have all of the bones in it (not by a long shot!), it did have a fairly wide selection.  Here are a few of the bones that they identified!

One of the only claws that I saw (not to say that there weren't any others out there) is in the picture below.

Possibly a sauropod ilium.

Several bones identified.

What looks to me like a sauropod vertebrae.

Several articulated vertebrae.

More bony jumbles!

You can also see the top of the quarry wall in this bony jumble shot!

A Stegosaurus plate lies just about in the middle of this shot!

Here is a brief guide to some of the Camarasaurus bones found in the quarry!

A Stegosaurus sacrum (the center, or "body," of the big butterfly-shaped bone) and the left and right ilium (the outer parts, or "wings," of the big butterfly-shaped bone).

More of the quarry face.

A few more shots of various articulated vertebral columns!

A close up of another vertebrae, possibly a sauropod!

A few more shots of Stegosaurus plates!

The plate from the last picture is in the top right hand corner of this picture of what I think might be a sauropod coracoid.

Next time: other things at the quarry!

Drive to the Quarry: Dinosaur Road Trip With Grace Part 3

PREVIOUSLY, ON BATTLESTAR GALACTICA:

-Grace Albers and I are taking a trip down to Dinosaur National Monument in Utah and Colorado.
-We checked out some cool petroglyphs and then camped the night.
-And now....

Grace was up before I was, and got some cool pictures near the Green River that went right by our campsite!

A sprinkler going off on the farmlands across the river!

A golden-mantled ground squirrel back at the campsite!  These things sure can get pesky, especially if there's food around!

After a quick breakfast, we were off to the quarry!  Here are some of the gorgeous scenery shots on the way!  Pyg definitely enjoyed our view of the Green River!

The Green River in the bottom of the shot!

And then....we saw it!  As we were driving, Grace suddenly told me to stop and back up (as there was no one on the road.  I was being safe, mother, don't worry).  Her instincts were right: it was a golden eagle!  Here are a ton of great shots she took!

Pretty awesome pictures, right!  Well, we continued on to the quarry and were met with an enormous Stegosaurus statue out front!  Here is a picture of Grace next to it!

And here's a Pyg pic!

We went inside of the visitors center.  While we waited for the shuttle to arrive to take us up to the quarry, we looked at some of the things that were inside of the visitor center!  First off, we have some fossil lizard footprints from the Chinle Formation, a Late Triassic formation of North America, whose rocks are around 225 million years old!

Next we have part of the jaw of the large Morrison Formation predator Allosaurus!

Now THIS I thought was really cool, and we will talk more about it in later Dinosaur National Monument posts, but pretty much the two pictures below are before and after pictures.  The first picture is what the intersection of the Green and Yampa Rivers looks like today.  The second is a drawing of what the area WOULD look like if a dam had been built downstream in 1950!  Fortunately, the dam plans were averted!  We will talk more about this dam thingy later!

Pyg touches a large hunk of rock that is about 1.2 BILLION years old!

"What do they keep in there, King Kong?"  Nice Jurassic Park reference, Zack.

After a bit of waiting, the shuttle arrived!  Pyg eagerly awaits our departure!

As we were boarding the tram, I noticed a pair of birds of prey soaring above our heads!  Originally, I thought that they were two of the same birds, and it wasn't until after I put the pictures onto my computer that I realized that these were two very different birds, indeed!  However, I had little to no idea what these birds were, so I contacted Anne Price, the Curator of Raptors at the Raptor Education Foundation, who often brings some fantastic birds to the Best Western Denver Southwest!  To see some fantastic pictures of these experiences and to learn more about them, click HERE and HERE!

Anyways, after talking with Anne, she said that the above picture, as well as the two below, are all of an immature red-tailed hawk, "with a very distinct “dash-and-comma” markings on the wings."

Anne got pretty excited about this last picture, though!  Here is what she said in the email:

"I am 99% certain it is an adult goshawk!!  Very rare to see this bird soaring, and totally in an unusual area; this bird is getting ready  to migrate, or has already started to. Of the 3 accipiters in the US (which are known for having short wings and long tails), the goshawk has the longest wings proportionally to the body and tail. You can very much see that in evidence in your photo. The distinct stripes on the tail are a giveaway too."

Pretty exciting stuff, I'm glad we got the chance to see one!

Finally, as the tram started moving, we noticed some ripple marks frozen in the rock face above us, a reminder that most of the surrounding area was under a shallow inland sea!

Next time: The Quarry!