Exuviae – OdoNotations

Two provinces. Six families. One unbelievable day.

Swift River Cruiser (Macromia illinoiensis)

If you had told me it was possible to see more than a dozen Prince Baskettails hanging from the pine trees like early Christmas ornaments, three perching Swift River Cruisers (including two in a mating wheel), a perching Springtime Darner, an ovipositing Cyrano Darner, an emerging Dragonhunter, four additional clubtail species, a dozen Brush-tipped Emeralds, about 50 Widow Skimmers, and an Arrowhead Spiketail all in a single day here in the Ottawa region, I am not sure I would believe you. That kind of day is so rare in Ottawa that I would would assume that you were engaging in a particularly fanciful daydream. However, on the Quebec side of the river many things are possible. Part of it is due to the scenic geography – the deep, rocky lakes, rushing streams, and variety of marshes, swamps and bogs carved out of the Canadian Shield provide a fantastic variety of habitats. Part of it is due to the untouched wilderness outside of the Gatineau area – there are no cottages lining the shore, no subdivisions full of manicured lawns, no pesticides and insecticides to wreak havoc on insect populations. These two factors make it an excellent place to see a variety of odes – especially along the Ottawa River, a major dragonfly habitat of its own.

Canada Day Clubtails – Part 2: Emergence

I’ve seen large numbers of emeralds (Spiny Baskettails) emerging at Mud Lake and skimmers (species unknown) emerging at Roger’s Pond. These mass emergences were thrilling, but not surprising given how I often I see large numbers of adults of both types of dragonflies feeding together before dispersing – swarms of baskettails flying up and down trails, and large groups of Chalk-fronted Corporals and Dot-tailed Whitefaces resting on various perches close to the water. Clubtails are not usually found in swarms or large groups (they are perchers rather than fliers, so a swarm would be particularly unusual), so I never thought I’d see a large emergence of members of this dragonfly family. That changed with my Canada Day visit to Sheila McKee Park.

The first emerging clubtail caught my eye when I saw what looked like two nymphs on the rocky beach grappling with each other. Closer inspection revealed it to be a nymph trying to break free of its larval shell so it could complete its transformation. It seemed odd to me that it was on the ground – all the baskettails I’ve seen emerging had crawled up onto the branches of the shrubs at the water’s edge, and all of the skimmers had crawled up the stems of the short grassy vegetation lining the trail at Roger’s Pond. The only place I’ve seen clubtail exuviae is on the trunks of the large trees behind the ridge at Mud Lake or on rocks within the water in Gatineau Park. It looked to me that this fellow had walked out of the water and couldn’t wait to get to a safe spot before bursting out of the shell. It was a clubtail, the only nymph I can identify with confidence because it is the only type of dragonfly with widely-separated eyes.

Clubtails at Sheila McKee Park

On July 22nd I received an email from Chris Lewis about a new dragonfly spot along the Ottawa River. I’d been to Shelia McKee Park out near Dunrobin just once, on an OFNC trip in 2015 to look for herps; it has a network of woodland trails and a steep staircase that leads down from the top of the cliff to the rocky beach at the bottom. Chris said she found evidence of a very recent dragonfly emergence of in the form of both exuviae and teneral dragonflies; she recognized exuviae of both clubtails and emeralds, though she was not able to identify them to species. She saw an unidentified darner and several teneral meadowhawks in the woods, and several Powdered Dancers and a pair of Stream Bluets in tandem near the water. However, it was her clubtail report that intrigued me: she mentioned one Lancet Clubtail, both mature and teneral Black-shouldered Spinylegs, several Midland Clubtails, and one Cobra Clubtail which had become the unfortunate meal of a Midland Clubtail. It is amazing that I’ve never considered going back to this park for odes before – the shoreline here is quite rocky, with little or no emergent vegetation, reminiscent of Britannia Point at Mud Lake or the causeway at Morris Island, both of which are great spots for clubtails. Curious to see these clubtails for myself, I headed out the following Sunday (July 28th) and brought my net in case there was anything worth catching.

Back to Gatineau Park: A Snaketail Adventure

While at the Dunlop Picnic area, Chris and I got a call from Chris Traynor saying that he was on his way up to Meech Lake. Chris Lewis and I were on our way there next, and it didn’t take him long to catch up with us as we were walking down the large hill to the lake, listening to the vireos and a Blackburnian Warbler singing. Our destination was the waterfall at the old Carbide Wilson ruins where we hoped to find the snaketails Chris T. had reported seeing earlier in the week. However, first we spent some time exploring the shore of the lake where we found Powdered Dancers, a Chalk-fronted Corporal, and a couple of clubtails on logs too far from shore to identify. It was too early for the Slaty Skimmers to be flying; these dark blue dragonflies are one of my personal favourites, but we saw more than enough other species to make up for their absence.