Field Report: 11 June

I don’t think I can describe to you what it was like. Maybe if you’ve been to the tundra, or the Great Lakes, or some other part of the continent infamous for its biting bugs, you might understand. Maybe we can come together and form a support group for people who have suffered at the mouthparts of insects. But if you have lived a generally normal life in generally normal places—as I had up to this point—I’m simply not sure you can comprehend
how
many
mosquitoes
there
were.

But I’m getting ahead of myself. Again.

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Mel carries Chance to his post at the Turbid site.

The Mt. Currie site seemed promising at first. An overgrown road allowed us to drive most of the way to the nest and walk the rest. A flat, mossy patch of forest provided the perfect trapping area to set up nets and blinds. But there were early signs that this site might be a challenge. On the first walkthrough of the site, the female stooped on the scouts and actually struck Jeff, even though they were still a good distance from the nest. Yet once the nets and blinds and owl were all in place, she returned to her nest and stubbornly stayed there, no matter how much we hooted and shrieked to draw her in.

We all waited inside the blinds, bored and mildly miserable. It was a hot day, but there were too many mosquitoes to leave the blind door open. Where the bottom of the blind didn’t quite meet the uneven ground, mosquitoes slipped in. We tried sealing the gaps with our packs, without much success. The air inside the blinds was warm, sticky, and buzzing.

The nest wasn’t visible from the trapping area, so eventually a small group ventured (cautiously) back to the nest to make sure the female was actually still in the area. Not only was she still in the area, their presence got her attention in a way the hooting owl hadn’t. She abandoned her nest to circle above Chance, weaving in and out of the branches overhead. Finally she made a dive from directly above him, which is the worst possible scenario when using a dho-gaza trap—it’s the only angle from which the goshawk has a chance, albeit a small one, of striking the owl without striking the net.

At this point everything descended into barely-controlled chaos.

The goshawk did not strike Chance, but did hit the nets. Jeff rushed to get the goshawk out of the net. Mel rushed to help him. John rushed to climb the tree. Chris rushed to spot him. I rushed to… I honestly don’t remember what I did. What I mostly remember is feeling rather useless and underfoot. At some point I wound up in one of the blinds with Mel and the goshawk, taking notes and handing her things. It was so hot in there we both had sweat running down our faces and we had to leave the door open because we were afraid the bird would overheat (something birds do rather easily). With the door open, the mosquitoes were terrible. I was so busy swiping them away from my face I could barely write. I swatted a few against the data sheet, leaving dark smears of blood and mosquito across the page.

The female would not stop screaming. There’s a lot of discussion (rightfully so) in any project involving live animals about “distress.” It’s important to recognize when an animal is in distress, to minimize its distress as much as possible, and to know when it’s too distressed and needs to be released early. This bird was not what I would call “distressed.” This bird was angry. This bird was furious. This bird wanted to kill us and everyone we had ever loved. When she screamed, it was a scream of pure, elemental rage.

This was the uncomfortable moment when I realized I was somewhat afraid of my own study species.

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The Mt. Currie female gets fitted for her backpack. Check out the mosquitoes on poor Mel’s arm.

I didn’t have time to dwell on this realization because the barely-controlled chaos was still going. Almost as soon as we had the female out of the net, we heard the higher, sharper call of her mate, and Jeff hurried to get the nets back up so we could continue trapping. Only a few minutes later the male was caught, as well, and I was called away from Mel and the terrifying bird she held to help Jeff untangle the male from the net.

Here the real agony began. The mosquitoes had been bad inside the blind, but even with the door open they were nothing like how bad they were outside the blind. They were everywhere. Flying into my eyes, my ears. Crawling over my face, my hands. Because I needed both hands to hold the male goshawk, I couldn’t brush them aside. There were dozens of them on me at every moment. The pain was so continuous, it no longer felt like a series of insect bites but instead like pins and needles, or a burn. I began to sway from foot to foot, trying to distract myself. I focused on my breathing. I tried muttering a mantra under my breath (a mosquito flew into my mouth). When I looked at my hand I could see them coating my skin, each proboscis buried all the way to the head, each belly swollen ruby-bright with my blood.

Screw waterboarding, I thought. They should try mosquitoes at Guantanamo Bay. If there was someone to whom I could confess all my top-secret information, I’d do it right now.

Right about at the moment I decided to throw the male to the ground and run screaming out of the forest, science be damned, Mel and Jeff finished with the female and took the male away from me. I rubbed frantically at my skin, almost crying with relief. I don’t even remember the birds being released. We frantically grabbed our gear and fled back to the trucks.

My lips were swollen where I’d been bitten; my cheekbones and forehead were so mottled I look diseased; my hands swelled until my thumbs looked like sausages, and my left hand didn’t return to its normal size and shape for two whole days—but it was totally worth it because we tagged both birds at the site that day. And that was a pretty amazing thing.

Field report: 10 June (2/2)

Flush from our success at Turbid, we continue deeper into the Squamish valley, crossing the Squamish river to follow one of her tributaries, the Elaho. It never even occurred to us to reconnoiter the site, called Dipper Creek, before we hauled our gear and Chance the owl down a short but steep slope to an overgrown logging road. From there we fanned out, looking for the nest we knew was there—without much luck. Even Chris, who helped to find the nest in the first place (and who has an amazing memory for locations) struggled to find it. Eventually he spotted it: a few ragged sticks clinging stubbornly to a branch. The rest of the nest lay scattered across the ground, along with three dusty blue eggshells, all cracked and empty. The nest was destroyed.

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Broad stumps hint at what the thin, dense forest of Dipper Creek looked like.

We stood around in a dispirited clump, speculating on what had happened. Obviously a predator had attacked the nest and eaten the eggs. It seemed unlikely that a bird, like a great-horned owl or a raven, would destroy the nest itself. But a bear or marten could have climbed the tree and torn apart the nest looking for more tasty morsels once it had licked the eggshells clean. Goshawks rarely renest, so it was unlikely the pair who lived in this territory would try to breed again this year. Miles strolled along the road, hopefully playing goshawk alarm calls, but there was no response: the goshawks were long gone,

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There was nothing else to do except to haul everything back up the slope, and while an owl may not weight much, the carrier that holds it is a very, very awkward burden. We were all hot and sweaty and tired by the time we reached the trucks, but despite the disappointment of the destroyed nest we were all smiling. Our first day of trapping, and we’d caught a goshawk—I’d call that a victory.

Notebook: Generating buffers

Method for generating buffers (circles) around nest to simulate breeding area (~ 3 ha) and breeding home range ( ~ 3700 ha) in QGIS1.

Vector > Geoprocessing Tools > Buffer

Input layer = layer with nest locations
Distance = 1.96 / 6.86 km2
Segments = 5 / 15

Remember to save scratch layers as shapefiles.

buffers

  1. These numbers come from research on Vancouver Island, published in McClaren et al. (2015). 3 ha is rounding up from 2.63 ha.
  2. Distance refers to diameter. This is the diameter that produces a circle of approximately the correct area.

Field report: 10 June (1/2)

As I type this post, the swelling in my hands has, after 48 hours, mercifully reduced and it is no longer painful to bend my fingers. My cheekbones and forehead thankfully no longer look like I have contracted an exotic skin disease, and my nose has finally returned to its normal proportions. But the backs of my hands are still mottled with dozens of angry red bumps, courtesy of one of the more hellish sites I’ve ever visited. But I’ve gotten ahead of myself: let me start at the beginning.

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Have I ever mentioned I like maps?

I act surprised when I say this, as if it were news to me. It is, though it shouldn’t be. In retrospect, the signs have been there the whole time. I remember lying on the living room floor as a child of some indeterminate age, half on the rug, half atop a large unfolded map. The map was one of those state maps members get for free from AAA: this one was of Oregon. The complex order of folds required to pack the map down into a compact little rectangle baffled me, but I always took the time to figure it out because I loved that map. I would spend hours poring over the lines, patterns, and differently colored patches, fascinated by all the placenames. Crater Lake was especially intriguing to me: I came again and again to the little blue circle, surrounded by its dark green park border, and dreamed of seeing it in three-dimensional space.

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Sometimes

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Sometimes—okay, let’s be honest, usually—when I try to plan something, I get stuck. It’s because I’m terrible at planning things. When there are more than three things to juggle in my head I start dropping them, and adding time just makes everything worse. Getting the ideas out of my head and onto paper helps—sometimes. But sometimes I just stop planning and start doing, with the (naive, optimistic) assumption that I’ll figure things out as I go along. Sometimes it works.

Sometimes it doesn’t.

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