page two
ODELLO ODES
The Carmel River mouth lagoon is a favored birding spot, including the lagoon at Carmel River State Beach, and the 'new' Odello 'arms' in the wetland restoration project. The entire Carmel River mouth vicinity is one of the top birding spots in California; I have a set of pages about birding here.

The sunny but breezy afternoon of 7 July 2006 was much like any other birding walk interesting birds were about, including a male Ruddy Duck going through a full courtship display with rapid head bobbing and tipped-up tail (right).

But this walk was a little different for the first ever here, Rita and I were looking for dragonflies (in addition to birds). Somewhat amazingly, there was a fine variety of odes to be seen:

We first encountered several large tomato-colored dragons patrolling stretches of the weedy, and tick-laden, path. They were constantly in motion and it took all of my patience to wait until it alighted. Using Manolis (2003), we've identified it as Wandering Glider  Pantala flavescens. The chestnut-red eyes are cool; so are the deep blue spots atop the end of the abdomen. It is a true wanderer, and occurs almost worldwide, including the middle of the Pacific Ocean (e.g., Hawaii).
Another large and impressive dragon it also patrolled a route and spent 90% of its time in the air was Blue-eyed Darner  Rhionaeschna multicolor. It was a 3" wingspan and looks very sturdy. It is a widespread species in western North America, ranging from sea-level (here) to over 7000' elevation. This is a male with blue 'racing stripes' on the thorax.
Of course, many odonates are very small, especially the damselflies. Unlike dragonflies, which hold their wings out when perched, most of the damselflies hold their wings in next to their body when perched.

This one (right) keyed out to Familiar Bluet  Enallagma civile, based upon the relative amounts of blue versus black on the abdomen and details of the male's apparatus at the tip of the abdomen (inset): a broad, rounded cerci (the upper of the two final appendages) with a pale tip. There are 35 bluets north of Mexico and 8 in California (Manolis 2003). They are only one inch long, so this photo is about 5X life size. It is very easy to overlook bluets (and other damsels) unless you are looking for them. Males bluets are blue-and-black but females and young males are dark-and-tan and very difficult to identify.

There was plenty of sex going on in the marsh. Most odonates lay eggs in the water so many species search for mates at the water edge discos. If you don't know anything about dragonfly sex and I didn't until reading Manolis (2003) I thought that flying in tandem was the mating act. It is not. Rather, copulation is  complex. The male has specially designed hooks and graspers at the tip of his abdomen, and he grabs the female just behind the head or thorax. The female then bends her abdomen forward to bring her reproductive organs to the male's secondary genitalia, housed on his second (of ten) abdominal segments. So they have two points of linkage, and this position is called "the wheel" (below). They may hold this position for a few minutes to an hour, depending on species. [Is this in your Kama Sutra?]
The damselflies "in wheel" (above) are a pair of Pacific ForktailIschnura cervula. They are only an inch long, so this view is much larger than life size. The female here (she's the lower one) is quite similar to the male; this is a condition in which the female is called andromorphic. When females look different than males, the condition is called gymnomorphic. Females in both conditions can mate and lay eggs. The tiny turquoise spots on the black-topped thorax are one important i.d. feature. Pacific Forktail is common and widespread in California, and it ranges from southern Canada to northern Mexico.
And after sex, what does a dragonfly do? No, they do not smoke a cigarette. She lays eggs (just now fertilized), often with the male still "in tandem," grasping her by the neck or, in some species, hovering just overhead. Presumably this allows him to assure that "his" eggs are safely laid without interference by other males. The term for egg-laying is oviposition. During our little walk, we lucked into a pair in oviposition (below).
The species that we spotted in oviposition (above) is one of the largest of all dragonflies: Common Green Darner  Anax junius. It is up to 3" long with a wingspan of 4 inches. The males with green thorax and blue abdomen spend almost all their time patrolling over ponds and lakes, seemingly never landing (and apparently mostly doing so in the woods away from the water). They are common and we've seen them almost every time we've looked, but I despaired of getting a photo. It took this situation when he's hooked up with the all-green female to get a shot (and it even has a reflection!). Note that the female has dipped the tip of her abdomen into the water to lay eggs.
TO NEXT PAGE OF "DRAGONFLY JOURNAL"
Literature cited:
Manolis, T. 2003. Dragonflies and Damselflies of California. Calif. Natural Hist. Guide 72. Univ. of Calif., Berkeley, CA.

PHOTOS: All photos are © 2006 Don Roberson; all rights reserved.

TOP

TO PORTAL PAGE OF DON'S ODONates

TO LIST OF BIRD FAMILIES OF THE WORLD

TO MONTEREY COUNTY PAGE

TO HOME PAGE

Page created 9 July 2006