Sunday August 30, 2015 - Notes 1

  Tree Foliage Early Changes - Ash Tree
  Feather Run - Mainly Dried Up - Precipitation Lately
  Dragonfly - Common Whitetail Skimmer
  Dragonfly - Common (or Eastern) Pondhawk

  So I'm going to start by writing about tree foliage...

  During the last half of August, and especially the last full week, I've noticed obvious early signs that some trees in the area are already starting to change color with the season. While the vast majority of tall trees are still various shades of green, there are many with parts or all of their foliage taking on a yellowish tinge, and over the last full week of the month these trees, while very scattered, are starting to be obvious to pick out from the rest. On our property, the big Ash Tree in the front yard started to show yellowed leaves around the middle of August or just afterward, and it's really showing them now. This is a photo I snapped of it with my cell phone just late this morning:

  This tree seems to be the only one on the property we own that's showing any changes so far, though some of the other ones like the Roughleaf Dogwood and the Forsythia Bush in the front yard, along with the big Lilac Bush in the south side yard, might be showing some slight changes. The Ash is always the last tree here at home to get full foliage in the spring and the first tree to show autumn changes, but this year it seems especially early! In fact, when I looked at older photos I snapped with the cell phone last year, this is what the Ash Tree looked like around the middle of September in 2014. I wonder if all the extra-rainy weather we had from late spring through July, then the dry spell that we've had since, has somehow accelerated the process for this tree? I'll keep documenting it.

  I walked around our bank of Feather Run Creek just before noon today and snapped a few photos of it. The water in the creek is very low, and it has been for most of this month. The last measurable rain that I've recorded here at home was 0.01" during the early morning hours of Thursday the 20th, and the last time we had over a tenth of an inch of rain was almost two weeks ago on Monday the 17th, when I recorded 0.35" in my gauge. We've only had traces of it since then, including a few sprinkles yesterday.

  Here are two photos I took of Feather Run late this morning. One shows the view looking northwest from my back yard fence, and the other is a closeup showing the muddy creek bed with just shallow, slow-moving water moving through it. The bed is also sporting plant growth. Cattails near the creek are at the point where many of the brown flower heads have started to erupt into seed.

  There's a lot of insect and bird life that I'd like to mention today, but I'm going to concentrate first of Dragonflies. Just like last weekend, there are a lot of them darting and hovering over that shallow water in the creek, chasing each other around. They're of a species that I've seen around our property in the past, and I think they must breed in shallow, slow moving creek water. I did some research online today after getting some of the best looks that I could, and I'm certain that I'm seeing the Common Whitetail Skimmer (Libellula lydia). Interestingly, I'm also seeing males, not females (though females might be around). The dragonflies that I've noticed have whitish or pale-blue abdomens and wings that have a big black bar or spot in the middle. But these dragonflies show sexual dimorphism; females have different colored wings and bodies. Here are a couple of photos that I was able to get from the Internet:

Male Common Whitetail Skimmer (from azdragonfly.org)

(Older male; younger males have an abdomen pattern like the females but have this type of wing pattern.)

Female Common Whitetail Skimmer (from bugguide.net)

  There was another kind of Dragonfly that I saw today that had a bright green body with dark bands on the abdomen, and clear wings. I was able to get a photo of it after it landed near the creek bank on an old Cattail stem, but the photo wasn't great. Again, some research on the Internet has made me pretty confident that what I saw was a Common (or Eastern) Pondhawk (Erythemis simplicicollis). This time, the one I saw was a female, or possibly a younger male. Older males of this species tend to have blueish colored abdomens. I honestly never knew before today that different sexes of the same species of dragonfly have different coloring, at least in some cases! Again, here are some photos of this species I was able to get from the Internet:

Female Common (Eastern) Pondhawk (from dragonflysite.com)

Male Common (Eastern) Pondhawk (from dragonflysite.com)

(Younger males have an abdomen coloration similar to that of the female.)

  According to the information that I have, Common Whitetail Skimmer females lay eggs in water by landing near it and dipping their abdomen into water several times, while the Common Pondhawk female drops its fertilized eggs into water (I'm not sure if this means that it dive-bombs.)

  There are over 5,500 species of Dragonflies and Damselflies known in North America and over 450 species are found throughout the United States and Canada, so I'll never get to know them all. But today's observations and research are a start!