Emergence of Spring Butterflies and Mustard Whites

Eastern Pine Elfin

So far it’s been a strange spring. It took a long time to warm up to 0°C and then a while longer to warm up to double digits. Early April was cold and very windy; it didn’t get consistently above 10°C until April 21, but even then it was too gusty in the afternoons to go looking for butterflies. My first butterfly of the year was a Mourning Cloak seen on April 5th at the Rideau Trail on Old Richmond Road. It was a beautiful day of 13°C, and I figured I had a good chance of seeing my first butterflies of the year there….though it was a toss-up as to whether it would be a Mourning Cloak or an Eastern Comma, both of which hibernate as adults in woodlots. While I saw a few more Mourning Cloak in mid-April, butterfly season didn’t really start until the second last day of the month.

Nova Scotia 2021: Scots Bay

Seashell on the Sea Shore – Scot’s Bay

On Saturday, July 31st my fiancé and I took two days to make the long drive to Nova Scotia. We planned to stay two weeks, although we were both working remotely at a cottage on the shore of Scot’s Bay, Kings County during the first week and used the second week as a true vacation week in Greenwood. By then there were no restrictions to enter Quebec or New Brunswick, although we had to show proof of vaccines and a travel permit at the Nova Scotia border. Once inside the border we were still subject to gathering regulations, mask mandates, and contact tracing protocols to dine indoor at restaurants, something we hadn’t done in Ontario since last fall.

Scot’s Bay is a community on Cape Split. The cape juts out into the Bay of Fundy, separating it from the Minas Basin. This continuation of Nova Scotia’s North Mountain range is 7 kilometres long and ranges between several kilometres to several dozen metres in width. It reaches 200 metres above sea-level at the scenic Look-Off halfway along the highway, and terminates in the relatively new (2019) Cape Split Provincial Park at the end. It also has a second provincial park, Blomidon, on the Minas Basin side, and a tiny access point to the beach on the Bay of Fundy side called Scot’s Bay Provincial Park. This is where I got my lifer Sanderling in 2008.

Five Butterfly Families at Marlborough Forest

Acadian Hairstreak

I finally returned to Trail E6 in Marlborough Forest on Sunday, July 11th. My goal was to find some skippers, particularly the Two-spotted Skipper which I had found at both trails (E4 and E6) last year, and more emerald dragonflies. I didn’t arrive as early as I normally do, as I was more interested in finding bugs than birds this time. Even so, the birds seemed quieter as I started down the trail just before 8:00 am….although I heard a couple of Wood Thrushes and Winter Wrens and warblers, there seemed to be fewer of everything. It was a while before I even heard my first Red-eyed Vireo, Black-and-white Warbler, and Eastern Wood-pewee, and the silence was puzzling. It is sad to think that breeding season is coming to an end already.

The coyotes, too, were quiet, although the deer flies and mosquitoes that constantly buzzed around me were not. It was difficult to try and listen for birds with their annoying whine constantly droning in my ears. I thought I heard a distant Ovenbird, a distant Scarlet Tanager, and a faint Nashville Warbler, but they only called once and I was too distracted swatting the bloodthirsty bugs away to be sure.

More Marlborough Butterflies

Eastern Tailed Blue

Every time I leave Marlborough Forest I can’t wait to go back. My last visit occurred on June 12th, and as insects were my primary target, I was disappointed that the cloudy, rainy weekend weather toward the end of June meant I wasn’t able to return until July 1st. Once I saw the gorgeous, sunny forecast for Canada Day I knew immediately I needed to return to Trail E4 in the hope of finding some skippers and maybe some unique emeralds. Last year I had seen some large unidentified emeralds patrolling the trails well before the early morning shadows had vanished from the narrow trail, so I made sure I left early enough to find any that might be out and about despite the coolness of the hour.

The birds were in full song when I arrived, and I was happy to hear the chorus of Winter Wren, Eastern-Wood Pewee, Wood Thrush, Scarlet Tanager, Veery, Red-eyed Vireo and a single Blue-headed Vireo intermingling with the usual Marlborough warblers: Black-and-White, Nashville, Black-throated Green, Pine, Common Yellowthroat, Northern Waterthrush, and of course plenty of Ovenbirds. I also heard a cuckoo calling, and in the far distance, the bugling of a Sandhill Crane! I heard its prehistoric call twice from somewhere north of the T-intersection beyond the ponds. This is the second time I’ve heard this species here – the first was back in March when at least two were calling to the west of the pond.

An Early Spring

Eastern Chipmunk

It’s been a while since we’ve had an early spring in Ottawa. In recent years it seems that the snow hasn’t melted until late April, it hasn’t really warmed up until May, and while the first couple of waves of migrants arrived on time, migration slowed down for a few weeks sometime in April when the north wind started blowing out of the Arctic again. Insect-eating birds were delayed, the butterflies and dragonflies emerged late, and then the Victoria Day long weekend hit and suddenly summer has arrived with temperatures in the mid to high twenties.

This year, however, it warmed up early and stayed warm. Our last subzero day was March 16th, and we regularly started reaching double-digit temperatures on the first day of spring, with nine days at 10°C or higher during the rest of the month. Our total snowfall in March was only 6.8 cm, below the normal range of 11 to 84 cm, and it was the windiest March since 1974. It was the 10th warmest March on record; our highest temperature reached 19.8°C, above the normal range of 8.3 to 19.2°C. I kept waiting with dread for one last cold spell or dump of snow, but so far April has been even nicer, with the first two days reaching only 3°C and the rest (to date) ranging from 10 to 24°C. As the snow disappeared quite quickly last month, plants are emerging from the ground early, buds on trees are starting to leaf out early, and butterflies are emerging early. It’s been great for my mental health to see so many signs of new life and renewal.

Butterflies of Marlborough Forest (2020)

Mustard White

One of the reasons I enjoyed visiting the two new trails in Marlborough Forest so much this year was the wide variety in butterfly species. Even though I didn’t start visiting until mid-June and missed several early-flying butterflies I was still impressed with the different species I found, which included representatives from all five families: swallowtails, whites and sulphurs, gossamer-winged butterflies, brushfoots, and skippers. What was particularly amazing was the number of species that were either lifers for me (Common Roadside Skipper, Two-spotted Skipper) or species that I don’t see very often (Mustard White, Acadian Hairstreak, Aphrodite Fritillary, Baltimore Checkerspot, Crossline Skipper). I visited these two trails seven times between June 19th and August 8th; every visit featured a different suite of species. Skippers were most most varied between the middle of June and the beginning of July; by the end of that month I saw only a few Dun Skippers and a Crossline Skipper – a species I have only seen once before. While the trails were full of crescents and brown butterflies such as Eyed Browns and Little Wood Satyrs in June and at the beginning of July, by the middle of the month they had been replaced with Common Wood-nymphs and fritillaries. Here is a list of species that I saw on those visits.

Spring Arrives in midst of the Pandemic

Mourning Cloak

It’s been another slow spring; although the snow was quick to melt this year without any flooding, it took until the last week of April before temperatures reached a daily high of more than 10°C, and not once did Ottawa reach 20°C – in fact our highest temperature last month was 16.8°C (normally the highest temperature falls in between 20.7°C and 28.5°C). This is only the eighth time since records began in 1870 that April temperatures stayed below 17°C. Migrants have been slow to trickle in, however, this may be a reflection of the greatly reduced number of trails and habitats I visit rather than the actual number of birds passing through, as eBird sightings have been steady despite the cooler temperatures and persistent north winds. Despite the weather and the smaller area in which I’ve been birding, I’ve had some good mammal sightings in the past few weeks, and have seen my first butterflies of the season.

Images from Migration

Mourning Cloak

It’s been a slow start to spring migration. Normally by mid-May returning birds are everywhere, and songbirds are busy feeding and singing in the smallest of parks and unlikeliest of yards. This year, however, with the cold weather and heavy rains it feels like we are still two weeks behind schedule – I saw my first warbler species of the season (a Pine Warbler) at Mud Lake on April 14th, my second (a Yellow-rumped) at Andrew Haydon Park on April 21st, and then my third warbler (a Black-and-White) at the Eagleson Ponds on May 4th. It doesn’t help that Ottawa’s most dynamic and productive migration hotspot, Mud Lake, is closed to the public due to the flooding along the river, but even so I would have thought I’d have seen more warblers by now. It’s been difficult to find new species to add to my year list, even visiting different trails and conservation areas with Mud Lake off limits. Here are a few photos and some of my interesting finds from the past week.

April Summary

White-throated Sparrow

By the time March comes, birders are tired of winter and are eagerly awaiting the arrival of the first spring migrants – the Red-winged Blackbirds, the Common Grackles, the Turkey Vultures, the Song Sparrows and Killdeer. By the time April arrives, birders are eagerly awaiting the next wave of migrants and the first warm days of spring. This year, the second wave of migrants was delayed by the lingering cold temperatures and the lingering snow on the ground. Then it started raining in the middle of the month, and the rivers and creeks began to flood. It was really tough to find the motivation to go out – the weather wasn’t cooperative, the birds were late, and it wasn’t warm enough to look for the first butterflies of the year until toward the end of the month.

Wood Frogs and the First Butterflies

Compton Tortoiseshell

The following day was gorgeous, so I hit a few hotspots before returning to the Rideau Trail to continue my quest for the first butterflies of the year. My day started with a junco visiting my backyard for food, and a baby chickadee in our front tree emitting begging noises while fluttering its wings at the adult searching the gutters for insects or cached seeds. I had a Tree Swallow and a flyover Killdeer at Kristina Kiss Park, a drumming Ruffed Grouse and more Dark-eyed Juncos at Old Quarry Trail, and two Snowy Owls sitting on chunks of ice out on the river at Andrew Haydon Park. Only the Eastern Phoebe calling near the western creek made it seem like spring….it was slow to warm up to its alleged high of 15°C.