Watching Butterflies in El Dorado County

If you want to add tremendously to the fun of visiting Iron Mountain Road, Carson Pass, and Wrights Lake, the Yosemite area, etc. simply start watching the butterflies. I just started last year, and now I know why I never saw them before? I wasn't looking! Now my eyes are open and I see them pretty much everywhere. Track my progress in my Butterfly Diaries, below. Now you should try it. (Here are some great reasons to enjoy butterfly watching...)

For the photo collection, go to the next page.

New: Join in and discuss this subject on floralore.blogspot.com:

What Happened to this Pine White (Neophasia menapia)?

It was a victim of a crab spider, Misumena vatia; you can notice the spider's leg above right wing.

The crab spider has a clever trick: it can change its color from white to yellow, better to disguise itself on a flower head while it waits for a bee, a moth, or in this case, a butterfly. It grabs the prey and injects a venom, sucks out its meal and leaves. The luckless victim hangs there for awhile longer, looking like the real deal (to me). That's why I was so successful at sneaking up on this one: it was already muerto!

The Police Car Moth (Gnophaela vermiculata):

"The caterpillar on Cynoglossum is the Police Car Moth. The plant contains very poisonous pyrrolizidine alkaloids and these are taken up by the insect and used for its own defense; both larva and adult are 'warningly colored', gregarious and unafraid of predators." —Arthur Shapiro

Photo Threefer:

I came upon a large patch of wooly sunflower (Eriophyllum lanatum) while heading up from Wrights Lake. The flowers were being heavily visited by what certainly looked like several species to my untrained eyes. Turns out I was right.

This photo shows three butterfly species: The top one is Hoffman's Checkerspot (√), Chlosyne hoffmanni; the lower right one is Variable Checkerspot (√), Euphydryas chalcedona sierra, but what of the lower left? Is that a California Crescent? That would be surprising if so; they are described as "uncommon"! Well it's verified! "The one at lower left is in fact a female California Crescent (√), Phyciodes orseis herlani."

Good Reasons to Study Butterflies:

Be Advised...

Taking pictures of butterflies will test your patience. I have discovered that they have an uncanny ability to sense when you press the shutter button, and use that information to launch into flight and out of the view. Similarly, if they are perched with wings up and perfectly posed for that side-shot of the underwing, they sense the absolute moment to suddenly turn and face the camera, leaving you with a photo of the front wing edges.

The Butterfly Diaries....

After ten years of learning about native plants I discovered a related interest: butterflies! Until recently I had simply looked at them as a visual addition to a plant photo and let it go at that. Then I woke up and started to notice them for their own interesting patterns; getting started with identifying them has been a rewarding experience. Unlike flowers, where color photo books are typically not the way to go, butterflies are (so far) basically identified by matching a field photo with a guide's color pictures and descriptions of wing patterns. Some are confusingly similar, but many are surprisingly unique, allowing even a beginner to make a positive ID of some right from the start. That is satisfying. Check the Gallery to see what I have found so far

Here are the reports of the latest trips and what was findable:

7 June 08: Iron Mountain Road

After a recent period of really warm weather, I had to go out to check Iron Mountain Road. I was jumping the gun! The road was not open all the way through, and getting up to the Silver Fork turn was hardly worth it. I turned around and went to Ice House. Also not worth it.

I did go back up on 7 June and had better luck. Even though the road was open and I was planning on Carson Pass, I chose to alter my plans because there was still a fair amount of snow sitting in patches at 7000' and very few flowers were evident. I decided to head down Silver Fork.

When I got to the cattle guard, there was an open field of balsamroot (Balsamorhiza deltoides) which was worth stopping to see. As I wandered among the plants I was stirring up a little butterfly action, and I had yet another chance to appreciate my Pentax Papilio 8.5x21 Binoculars.I was enjoying looking at what turned out to be a Variable Checkerspot; beautiful 10x viewing without scaring it away. Now I know to look for some white spots on the abdomen. This is a characteristic that helps separate them from the very similar Edith's Checkerspot (Euphydryas editha).

My next find was one of the blues, but which one? I could see right away that it was a new one for me due to the dark wing edges and the neat row of spots. Turned out to be a female Boisduval's Blue. And after getting that one, I saw another that turned out to be a male.

All-in-all, a nice morning for even these few butterflies.


show/hide: 26 Apr 08: A Trip to Traverse Creek

show/hide: 25 Aug 07: Return to Tioga Pass
show/hide: 18 Aug 07: A Test Run to Carson Pass and Beyond...
show/hide:11 Aug 07: Return to Ice House
show/hide: 3 Aug 07: A Trip to Saddlebag Lake, Mono Co.
show/hide: 28 Jul 07: Butterfly Hunting: A Poke in the Eye from Real Life!
show/hide: 21 Jul 07: Spending More Time around Wrights Lake
show/hide: 14 July 07: Spending Time around Wrights Lake

I had never known that there were binoculars made specifically for close-up viewing of butterflies and flowers! Now that I know this, it makes sense. My usual binoculars focus down to maybe eight feet; that's not really as useful as the Papilio binoculars from Pentax. These babys focus down to 18 inches. Now that I have started tracking butterflies, I can easily see the value of having a way to check markings even when the bug is fairly close. They don't always hold still and wait for their picture. A good close view can help verify when a photo won't be available.

Field Guide to Butterflies: San Francisco Bay, Sacramento Valley Regions *****

The information is well-presented, with excellent color illustrations that are far better than those in the Peterson Guide*. The only "down side" for us in El Dorado County is that the book is not designed to cover this area, but it still warrants five stars because of the support text that explains butterfly details, with notes that pertain to our geographic area. This is a book that belongs on your shelf (or in your day pack).

Expanding the Search Area

If you have a tendency to wander up to areas higher than Placerville, you're going to want to have a source for those places too, and I am quite pleased with...

Butterflies through Binoculars: West *****

This book (still small enough to go into a daypack) is loaded with photos (side and top views) and will prove very helpful I have learned that the underside of the wing is actually a better aid in identifying than the more colorfully-marked tops. If I have one complaint it would be that the side photos are not always lined up with the top photos, causing some initial confusion when you must look in two places for photos of the same species. Still, it identifies hundreds of butterfly species and identifies whether they would be found in the Sierra Nevada, and when. (If I had two complaints, the other would be that the author insists on using the incorrect "Sierra Nevadas" to identify our region. Please!)

[Also available: Butterflies through Binoculars: East]

Peterson Guide to Western Butterflies *****

I have always recommended a Peterson Guide to Pacific States Wildflowers as a very useable book to start with, so I expected the same from their butterfly guide; I'm a little disappointed that the artwork is not as accurate as I'd expected (pale colors, doing no justice to the butterflies I have been finding) and Peterson's famous call-out arrows are not terribly useful in this book.

Butterflies of North America*****

I found this on the shelf at the Mono Lake Visitor Center, so of course I added it to my small library of ID books. While it does have a bit more help with how to start the ID process for a new-to-you butterfly, I think I'll have to spend more time with it to get comfortable with how it works. I have a picture that is good enough to have the details for matching, yet I cannot come to a real conclusion! Is that the fault of the book? Of course not. But at this stage of my learning I do appreciate photos in "Butterflies through Binoculars" over any well-done artwork. Ironic, that, because with flowers it is well-done artwork that is easier to use because photo details can confuse the issue.


[back to top]