Photo of the Week – April 20, 2018

The prairie is finally waking up (again) around here.  Before last weekend’s blizzard weather, plants were starting to green up, but all that stopped for a while last weekend so we could enjoy one last (?) snowstorm.  We didn’t end up with much accumulation on the Platte River, but our Niobrara Valley Preserve got over a foot of snow.  Yesterday afternoon, the sun was warm and bright along the Platte, so I took a few hours to enjoy the latest reboot of spring.

This tiny orb weaver spider was starting a web in a recently burned patch of prairie. The grass was only a few inches tall, but the spider was using the breeze to string silk between the young shoots. I laid on my belly for quite a while and watched it work.

I’m not sure if it finally noticed me or just needed a rest, but after working for quite a while, the spider retreated to this little hiding place. I waited for several minutes, but it apparently wasn’t going to keep working, so I left it alone.

I noticed this open hole in a fresh pocket gopher mound and thought maybe I’d catch the gopher bringing a load of dirt out of its tunnel. I sat quietly near the hole for a few minutes until I looked more closely and decided it didn’t look as fresh as I’d first thought. I don’t think anything had disturbed the soil at the mouth of the hole since the snow melted. Pretending not to feel foolish, I moved on…

This roundheaded bushclover (Lespdeza capitata) leaf had what I think were probably fungal spots on it. While it wasn’t fresh green growth, I thought it was interesting and attractive enough to be photographed.

While it doesn’t look like much, the yellow-flowered sun sedge (Carex heliophila) shown here was my most exciting discovery of the day. We can’t get it to establish from seed, so we’d moved some plants from a nearby remnant into this restored prairie back in 2011.  Since then we hadn’t been able to find any (tiny plants under tall grass). Since the plants were blooming yesterday, I went looking in an area that was grazed last year and found hundreds of them! The plants survived and are spreading quickly via rhizomes.  This was the first one I found.

Dandelions (Taraxacum officinale) are playing their annual role of supporting early pollinators until native wildflowers get rolling. Yesterday was the first time I’d seen any blooming, but I saw several flies (including this one) and a honey bee already feeding from them.

It’s supposed to cool off again this weekend, but the forecast doesn’t show temperatures dropping below freezing – at least for the next week.  Maybe spring will actually catch on this time?  It’ll be interesting to watch plants like windflower (Anemone caroliniana) that started to grow and then got frozen off – multiple times.  Will they still bloom, or will they just give up and wait for next year?  Regardless, it’s sure nice to see something moving around in the prairies besides dead plant stems being blown around by the wind.  Let’s go spring!

Photo of the Week – April 6, 2018

Predators play key roles in ecosystems.  When they are absent or rare, impacts ripple through landscapes, often in unexpected ways.  We all rely on the presence and effectiveness of predators, but usually fail to adequately celebrate their importance.

When thinking about predators, most people probably conjure up images of lions, tigers, bears, and other large vertebrates.  However, smaller invertebrate predators play the same kinds of critical roles as those big animals.  Here are a few portraits of tiny predators that help keep prairies healthy and vibrant.

No one will be surprised that I included a crab spider in this batch of images. This one ambushed a hover fly on hoary vervain (Verbena stricta).

This juvenile assassin bug is finishing off a fly.

This adult assassin bug sits poised and ready to attack any prey that comes near.

Jumping spiders, the teddy bears of spiders, are very effective predators – maybe because their prey gets distracted by their cuteness.

Dragonflies are large nimble predators that (fortunately for us) are big enough to handle small insects, but not big enough to cause us harm.