Fall Migration

Red-eyed Vireo

The end of August is the beginning of one of my favourite birding seasons: fall migration.  Even though identification is more difficult in the fall than in the spring – birds in winter or non-breeding plumage can be very drab and often resemble other species – the volume of birds seems to be greater and the migration process takes longer, commencing in August and ending in December. This means that every outing has the potential to turn up something interesting, whether a year bird, a life bird or a real rarity. I’m not particularly adept at finding rarities, but I do enjoy seeing species that I haven’t seen since the spring, and watching them feed and interact with other birds. Here are some highlights from the beginning of migration.

To Catch a Wandering Glider

Gray Comma

I had a fabulous outing in Stony Swamp on August 22nd. I started the morning off at Sarsaparilla Trail where I found a pair of Hooded Mergansers, two Pied-billed Grebes (an adult and juvenile), and five Wood Ducks on the pond. A small raptor was perched in one of the dead trees at the north end of the pond; it was so far off that I had to return to the car and get my scope to identify it. It was a Merlin – a species that I only find here late in the summer, individuals either migrating or undergoing post-breeding dispersal. At least six Blue Jays were also present, and kept chasing the Merlin from tree to tree. Three Northern Flickers were also flying around, and I don’t know if they were also giving the Merlin a hard time, or if the Merlin was trying to catch one of them. It was fascinating to watch the flickers, Blue Jays and Merlin all playing an animated game of musical chairs in the trees.

I was glad I had brought my scope, for as I was scanning the vegetation along the shoreline I discovered two heron species skulking at the edge of the pond: a tiny Green Heron poised on a log, and an American Bittern that was almost invisible in a gap in the reeds! It made me wonder what other birds were present, going about their lives while remaining hidden from view.

Wildlife Around the Yard

Chipping Sparrow (Juvenile)

I live in a townhouse in suburbia, so my backyard is quite small. The front yard is even smaller since our driveway takes up half of the property, but I do have a large shrubby tree right outside my front window that attracts some interesting birds every once in a while (I have not gotten around to identifying said tree, though I’m sure many of my naturalist friends would know what it was if I sent them some photos and asked; it’s sort of fun leaving it as a mystery). The most recent addition to my “front tree” list – which includes Wilson’s, Yellow, and Yellow-rumped Warblers and a female Purple Finch – was a Red-eyed Vireo singing in the foliage last May. Lately, a pair of cardinals have taken to roosting in the tree at night. I’ve seen evidence of this in the form of bird droppings on the car every morning, and know it’s the cardinals because I hear their metallic chip notes outside my computer room window just after sunset and before sunrise most days.

Marvelous Meadowhawks

Saffron-winged Meadowhawk

On August 16th Chris Lewis and I went to the Bill Mason Center to do some dragon-hunting. As the weatherman was predicting a steamy high of 30°C with 100% humidity, we met at 7:30 in the morning in order to beat the heat. For the second day in a row, a thick early-morning fog hung low over Ottawa, but once we arrived at the sand pit we found a bright, sunny morning with no trace of fog. It was really starting to warm up by then, but as it was still early in the day, all we saw at first were a couple of darners we accidentally scared up from the vegetation along the northwestern side of the pond. None were cooperative; instead of settling back down in a spot where we could see them, they zoomed off altogether.

A Long-awaited Life Bird

Great-spangled Fritillary

On Sunday August 9th I made plans to go birding and dragon-hunting with Chris Lewis. Our plan was to meet at Shirley’s Bay at 8:30, but I was up early enough that I had time for a quick check at Mud Lake before our meet time. A few early migrant warblers had been found along the river, and I was hoping to spot a few. My goal was to check the scrubby field west of the lake and the ridge quickly before driving over to Shirley’s Bay.

On Goldenrod

End Band Net-winged Beetle (Calopteron terminale)

On Saturday, August 8th I spent my morning in the west end, heading out early (6:40 am) to the Richmond Lagoons before returning to the unnamed Stony Swamp trail on West Hunt Club Road. According to the official NCC map, this trail, which starts at parking lot no. P11, is designated as Trail #26. This is where I had the Black-billed Cuckoo on July 26th and found a good number of birds to add to the eBird checklist for this site. I wasn’t sure if I could repeat that feat, but it seemed worth a try.

The Richmond Lagoons were very rewarding, though difficult to navigate as the side trails had not been mowed in some time. Worse, the dreaded Wild Parsnip has invaded the area. I first noticed huge swathes of this plant along the side of Highway 417 just outside the city while driving back from Nova Scotia in mid-July. Since then I’ve noticed it growing in the ditch along Old Richmond Road and small patches at Mud Lake (right where Chris and I started our dragonfly walks a few years ago) and Trail #26. This plant has gained a bad reputation for its phototoxic properties – if get the sap on your skin and are then exposed to sunlight, it will burn you.

An OFNC outing at Petrie Island

Eastern Amberwing

On August 2nd, 2015 I led a dragonfly outing at Petrie Island for the Ottawa Field-Naturalists’ Club. Because I would be leading it on my own, and because the small size of dragonflies and damselflies makes it difficult to point them out to large groups, I decided to limit the group to ten people. Fellow dragon-hunters and Birds Committee members Chris Traynor and Lorraine Elworthy signed up for the outing, as did Jakob Mueller, who led the reptile and amphibian outing at Sheila McKee Park earlier in the year. I recognized Lynne Ovenden from the OFNC; the others were all unknown to me.

I started our outing by talking about the differences between dragonflies and damselflies, as well as the different groups belonging to each family. We would be looking for spreadwing damselflies, which hold their wings out at a 45° angle instead of parallel to their back; emeralds and darners, which are most commonly found flying through the air searching for aerial prey; and skimmers, which tend to hunt from a perch and are usually the most approachable types of dragonflies for photography. As I was speaking, a bright green female Eastern Pondhawk was hunting from a perch in the vegetation, often flying out to snatch an insect from the air. At one point it even landed on one of the group members!

Mid-summer

Giant Swallowtail

It’s hard to believe that it’s mid-summer now; July is over, August is here, and songbird migration is only a few weeks away. When it comes to insects, I’m not thinking as much about seeing the first species of the season as I am wondering whether each individual (except for the darners and meadowhawks) is my last of the season. There are some species I seem to have missed completely this year, such as Emerald Spreadwing (which has a flight season from mid-June to mid-August), Horned Clubtail (mid-May to early July), Stream Cruiser (late May to mid-July), and any of the hairstreak butterflies (the peak of their flight season occurs in the first half of July). This is the result of a combination of bad luck and bad weather; I missed most of these bugs when I went looking in places where I have seen them before, and when I wanted to return later, the cold, overcast and/or rainy weather on the weekends prevented me.