Photo of the Week – December 4, 2015

We had a winter storm pass through our area at the tail end of the Thanksgiving weekend.  After a light coating of ice, we got a couple inches of fluffy snow.  Monday was a gloomy overcast day – too dark to inspire me to venture out with my camera.  However, Tuesday morning began with a beautiful sunrise and calm winds.  A fantastic opportunity for winter prairie photography.   Unfortunately, I had to enjoy the light from the interstate as I drove to a meeting.  Wednesday was another great sunrise and morning of light, but I was on the road again – heading to a different meeting.  Yesterday, most of the snow melted and, just like that, the first snow of the year was gone.  Not a single photograph taken…

So, instead of posting a beautiful photo of fluffy snow on the prairie today, I’m reaching back to a photo from August.

Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.  Click on the image to see a larger version – and maybe the hidden visitor on it.

I like this photo of a stiff sunflower for several reasons, including the interesting shapes of the ray flowers (“petals”) that are not yet fully extended.  However, I also like the photo because there is a hidden visitor on the flower that I didn’t see until well after I took the photo.  Can you see it?

Here is a cropped version of the image to give you a better look.

Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

Can you see the tiny larva feeding on pollen?

I don’t know what this little larva will grow into, but it appears to be feeding on pollen and stringing lines of silk between anthers as it moves.  I featured a similar larva in an earlier post that showed a sunflower which had been “sewed shut” by silk – probably as a protective measure to allow the larva to feed on the flower under cover.  I wonder if this larva will follow the same procedure as it gets bigger and can’t hide as easily out in the open.

Interestingly, the photos from that earlier post featuring the “seamstress larva” were taken on the same day as the photo in this post.  In fact, I took the photo of the tiny larva just a few minutes after photographing the sewed-up flower.  You’d think I’d have been on the lookout for larvae on sunflowers, but I still missed it, even through my macro lens.  Then, I missed it again as I worked up the photo later, even as I was looking closely at it on the computer to adjust sharpness, etc.  I guess that’s a testament to the effectiveness of the hiding strategy of this little larva!

I hope its camouflage allowed the little larva to grow up, pupate, and have lots of offspring to carry on its strategy.  I bet it did.

Photo of the Week – September 10, 2015

A few weeks ago, I took my camera across town for a walk in a small local prairie.  There were numerous flowers blooming, but the stiff sunflowers (Helianthus pauciflorus) were stealing the show.  I shot quite a few photos of them from various angles.

Hover fly on Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

This little hover fly was enjoying a meal of stiff sunflower pollen.  Lincoln Creek Prairie, Aurora, Nebraska.

Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

The sunflower perspective.

I noticed that a few sunflowers seemed to have their “petals” (technically speaking, they are the ray flowers) folded in toward the center of the flower.  I’d seen this quite a few times before, but this time I decided to investigate.  I gently pulled the petals apart and found they’d be held down with what appeared to be silk.  Beneath them, an insect larva was hiding and, presumably, feeding on pollen or other flower parts.

Caterpillar in Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

A closed-up stiff sunflower.

Caterpillar in Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

The larva revealed.  Note the remnants of silk and the anthers still sticking to the petal after I pulled everything apart.

Caterpillar in Stiff sunflower (Helianthus pauciflorus) Lincoln Creek Prairie, Aurora, Nebraska.

A close up of the caterpillar (?)

I’m not expert enough with insect larva identification to know for sure, but I’m guessing the larva is a moth larva – I know at least some of those have the ability to make silk.  Some of you reading this will surely know more about them and comment below.  (Thanks for your help.)

A few days later, I ran across some similarly closed up flowers in a different prairie.  When I opened those up, there was another larva inside, but it was much darker in color.  I wonder how many different species have this behavior?

The larva I found was just one of many examples of insects that create safe hiding places for their young to feed in.  Spittle bugs and gall-forming insects are two others that are common in prairies.  Of course, for every great hiding strategy, there is at least one predator that has developed a counter strategy.  I don’t know what eats the petal-tying larvae, but I bet there’s something out there.  I’m pretty sure guys-with-cameras are not the only ones who can find them.  Fortunately, for the larva I found, I wasn’t hungry at the time.