Familiar Bluet – OdoNotations

Last Odes on the Wing: October and November 2024

Another ode season is over. Ottawa had some beautiful warm weather during the month of October – there were 26 consecutive days where the daytime high reached 9°C or above (between October 1st and 26th), tying for the 5th longest streak on record. As a result of the warm weather, I thought this would be the year I’d find more species flying later. Our first frost of the season occurred on October 16th with an overnight low of -1°C; this is a week later than the average first frost date. Then a warm spell hit late in the month – October 30th reached a ridiculous high of 22.2°C and October 31st hit 23.9°C, the warmest such days since records began in 1872. The month was mostly dry, with very little rain until the 29th.

November was cooler, though daytime temperatures remained above zero throughout the entire month. It’s not the day-time high that limits the dragonfly season in Ottawa, however; rather, it’s the nighttime lows falling below freezing. While the latest-flying dragonfly, the Autumn Meadowhawk, can withstand a few light frosts, a hard frost will kill both it and the flying insects it feeds on even if subsequent days reach double-digits. November 2nd and 3rd were both below -3°C, while November 9th and 10th were both below -2°C. A string of subzero nights after November 11th followed by warmer but cloudy, windy or wet days after November 20th ended the dragonfly season for good.

Odonates on the Wing: October and November 2023

By October I’m thinking about putting the net away for the season. If it is still warm at the beginning of the month, I will usually take the net out as long as I’m still seeing darners and small bluets around. Once I’m seeing nothing but meadowhawks, however, it’s time for me to declare an end to the season and put my gear away until the spring. This year the first week of October was very warm, with temperatures reaching 30°C; they then returned to seasonal for the next week with temperatures in the mid-teens. By the end of the month temperatures were in the single digits during the day and falling to below zero overnight, bringing an end to all but the hardiest of dragonflies. That title belongs to the meadowhawks, in particular the Autumn Meadowhawk (Sympetrum vicinum). It is no coincidence that it is the latest-flying dragonfly in many areas of the northeast….sometimes by several weeks. Once called the Yellow-legged Meadowhawk, it was renamed in 2004 by the Dragonfly Society of the Americas because mature individuals often have brown legs instead of yellow and because it persists so long into the fall. It is the only dragonfly in our area with entirely brown or yellow legs (never black), making identification relatively easy. And it is the only species you are likely to see in Ottawa in November!

Odonates on the wing: September 2023 Summary

Although technically still considered summer until the equinox, the month of September ushers in the beginning of fall, the season most associated with change and impermanence, with encroaching darkness, with death and transition and the melancholy appreciation of the last burst of colour before the inevitable bleakness of winter. I can’t help but be reminded that this is the season of endings every time I go outside: the robins are gone from the neighbourhood, the songbirds in the woods have stopped singing, trees are changing colour, and the asters and goldenrods have replaced all the other wildflowers along roadsides and in conservation areas. In the dragonfly world, it is the season of the meadowhawk, the glider, and the darner, as these types of dragonflies are by far the most numerous. The goal now is to search out any others that may still be flying, and see how long into the season they last. Part of the reason is purely scientific – to get a better grasp of the flight seasons of local odonates. However, another part of the reason is purely emotional – I never know if a sighting will be the last of the year, and hope to put off the final goodbyes as long as possible.

Ode-hunting in Chatham-Kent: Peers Wetland

My mother lives in Wallaceburg in Chatham-Kent, which is about a 7.5 hour drive from Ottawa, or a full day train adventure with a transfer in Toronto (my advice for anyone travelling economy on Via: take your own sandwiches and snacks, as the menu was somewhat unpalatable…and chocolate bars/chips alone were $3.00). Being so far south she gets a variety of birds, bugs and plants that we do not get here in eastern Ontario, so I’ve been meaning to visit in the summer when I might see some new southern butterflies and dragonflies for my life list. I took an extra two days off at the end of August so I could spend the Labour Day long weekend with her, though two of the days were lost to travel. As my mother and her husband both enjoyed birds and nature, I knew they’d be interested in taking a few nature walks with me, even if the idea of looking for dragonflies didn’t exactly fill them with delight.

Orange Bluets at Andrew Haydon Park

After my successful outing at Andrew Haydon Park on July 29th, I couldn’t wait to return to see the Vesper Bluets again and to look for the elusive Orange Bluet. The two successfully share the same habitat at Petrie Island, so why not in the ponds at AHP? While Vesper Bluet habitat includes the edges of woodland lakes, ponds, and slow rivers rich with emergent vegetation, Orange Bluets are present in those habitats as well as in swamp edges, bogs, slow streams, and degraded wetlands containing varying levels of pollution. I knew they were already on the wing, as I had first seen them at the Eagleson Ponds on July 3rd and have been seeing them there on and off ever since. It was just a matter of returning to Andrew Haydon Park later in the afternoon when they would be at the water, as they spend the early part of the day in the vegetation or trees nearby.

Late Season Bluets

I was intrigued by the small blue damselflies I saw lurking in the vegetation at the Eagleson storm water ponds earlier on Sunday, so I returned later that afternoon with my net in order to catch them and identify them. The blue-type bluets are among the most difficult damselflies to identify, requiring a hand lens to see the male’s terminal appendages in order to distinguish between several similar-looking species. Fortunately there are fewer species flying this time of the year than in June and July, narrowing down the tricky possibilities to only a handful: Northern Bluet flies until mid-September, while both Familiar Bluet and Tule Bluet fly into October. Other blue-type bluets are already gone for the year, including Hagen’s Bluet (which flies until mid-August) and Marsh Bluet (which flies until early September).

A Lifer Dragonfly at Pinehurst Lake

During the third week of August I spent some time at my Dad’s trailer in the Pinehurst Lake Conservation Area near Glen Morris, Ontario. Although more of a campground/recreation area than a conservation area, it is nevertheless a great spot to spend a few days and see some “southern” wildlife. The last time I was here (August 2014) I was treated to the antics of a couple of juvenile Broad-winged Hawks, found a small pond where female Black-tipped Darners laid their eggs in the late afternoon, observed a Blue-winged Warbler on a morning walk, saw my first Red-spotted Purple butterfly, and even saw a bat near one of the washroom lights after dark. I didn’t see any Broad-winged Hawks or cool southern bird species this time, but I still ended up with 28 bird species over three days – the same number I saw in 2014 – and saw several interesting odes, including a lifer!