The birds and the bees

This week, Dispatches from the Field is excited to welcome Alannah Gallo. Alannah got her start in environmental consulting over the summer, and shares some of her adventures surveying both avifauna and pollinators in western Canada.

As I write this, I am about to land in Winnipeg, Manitoba, for my last round of pollinator surveys of the year…and I’m so relieved I’ve made it through the field season.

These past few months have been my first exposure to field work. I was fortunate to have two employers willing to share me as I worked on bird surveys for one company, and pollinator surveys for the other. Working two very different jobs at the same time and the huge learning curve that came with both was a lot to take on, but I’m so happy I did. In my bird survey position, I was fortunate to have an amazing and supportive set of coworkers to help me become a better birder. The pollination surveys, though, were a bit more challenging, as I was completely on my own for all the travelling, planning, and surveying I had to do from June to September.

A pollinator visits one of the flowers grown from our seed mixes.

The objective of Operation Pollinator was to measure the effect of pollinator seed mixes on pollinator diversity. Seed mixes were sent to landowners in Northern Alberta, Manitoba, and Saskatchewan who would plant them in sites they had set aside for the project. The idea is that I would have an initial meeting with the landowners, who would show me where they had planted the seed mixes, and then I would visit these sites, along with a control site (i.e., an area where no seed mix was planted), once a month from June to September to survey for pollinator diversity and abundance. There were five pollinator sites and one control in each province, for a total of 18 sites…so it was a lot to handle.

The process of surveying for pollinators is fairly straight forward. I placed pan traps, which are plastic yellow or white bowls filled with water and soap, along transects and waited for insects to fly in. (This works because pollinators are attracted to the colours yellow, and white). I also conducted net sweeps, using a bug net to sweep through the vegetation at each site. Finally, I did visual surveys – in other words, I watched what species visited the flowers from the seed mixes.

A common alpine butterfly captured during a net sweep.

When I got the job, it sounded totally manageable. I was eager to prove myself and set out to do what I could to prepare myself for the field work. I first studied pollinators during my undergraduate degree at the University of Calgary, where I took courses on invertebrates and entomology. Then I volunteered with John Swann, the curator of the Entomology Museum at the University of Calgary , who trained me to process and identify specimens. (One of the best things I learned from this training was how to fluff bumblebees – probably one of my favourite things to do!) Once I got the pollinator survey job, I refreshed my knowledge by reading up on the most common species of pollinator in western Canada and creating flashcards for the flowers I was told to focus on when at each of my field sites. I thought I was decently prepared, and ready to tackle this project.

I was so, so, wrong.

Identifying insects in the field was so much more difficult than I had anticipated. Insects at the museum were pinned and sat still, allowing me to focus, use my reference texts, and take my time. Insects in the field…not so much. I had to adapt quickly. Each month also came with a new set of organisms to ID, as both the flowers and the pollinators changed with the season. On top of that, although there was overlap, the biomes of the sites varied significantly across the provinces. In the end, I basically had to re-learn and memorize everything there was to know about pollinators…over, and over, and over again. During each day of surveying I would take photos or sketch doodles of the species I didn’t know and figure out what they were at night in my hotel. Then the next day, I would have to wake up and continue to my next sites. It was exhausting, but so rewarding.

One of my favourite memories of this summer took place at one particularly beautiful (and terribly tick infested) forested site near Erickson, Manitoba in June. I had laid out my pan traps and was waiting for whatever was in the area to land in them while I conducted my visual survey. After a few minutes, I checked on my traps and was surprised to see that a beautiful Canadian tiger swallowtail (Papilio canadensis) had been attracted by the colour of the pan trap and fallen inside. I quickly reached in to pull it out, but saw that my trap had soaked and damaged its wings. It needed a safe place to rest while it dried out…so I placed the butterfly on my arm, and it sat there while I continued my work for the next 20 or so minutes. Slowly, its wings dried, and eventually I placed it in some nearby clover. At that point, it was able to fly short distances, so I hope it was okay in the end.

The rescued tiger swallowtail who kept me company for half an hour of fieldwork.

I’ve come so far in four months, and I now have a much better feel for wildflowers and insects in Alberta, Saskatchewan and Manitoba. Considering how much I had to deal with, between managing life and working two consulting positions, I’m immensely proud of myself for handling it so well. I want to continue to pursue work in the consulting field, and so I need to become proficient at identifying birds, bees and plants. It’s an exciting journey, and I can’t wait to tackle more work next season and continue to push myself to learn and become an excellent naturalist.

Alannah Gallo is a biologist who works in environmental consulting in Calgary, Alberta. She has just started her Master of Science in Environment Management at Royal Roads University in Victoria, British Columbia.

 

A day in the life of a butterfly ecologist

This week on Dispatches from the Field, we welcome Jenna Siu to share with you her experiences running through the fields trying to catch butterflies! Check out her bio and website at the end of the post.

When I tell people I did my Master’s working with butterflies I get a lot of different reactions. Among fellow biologists or naturalists there is a certain appreciation for a study species even if it may not be their species of choice. However, among the general public it is a different story. Butterflies, are they even animals?

Butterflies are indeed animals and there are a ton of reasons why butterflies make great study organisms. They are relatively easy to catch, handle, and mostly easy to observe. Plus, butterflies are relatively short lived, which makes it easy to study them over many generations. Because of this, a number of butterfly populations around the world have been monitored for decades, resulting in work that has made major contributions to our understanding of population dynamics and conservation.

Part of my project was to assess the Eastern Tiger and the Spicebush Swallowtails’ movement relative to forest edges in the fragmented landscape of southern Ontario. Did they move towards the forest edge, avoid it, or a bit of both? To learn about this we caught butterflies and released them at different distances from the edge and followed them using a GPS unit to record their movement.

Spicebush swallowtail andEastern Tiger Swallowtail

Spicebush swallowtail and Eastern Tiger Swallowtail

Working on butterflies had a few benefits. They come out when it’s sunny and are active during the day. Swallowtails are some of the largest butterflies in Ontario, so they take longer to warm up. I didn’t expect to see many out before 10 am or after 5 pm. On a typical day, I rolled out of bed around 8:30 am, ate breakfast, and prepared my lunch. Eventually my field assistant would follow, we would pack the car and be on the road at 9:30 am. The main things to pack were butterfly nets, a cooler with ice packs and a towel, many glassine envelopes, a permanent marker, GPS unit, field guides, lots of sunscreen and water.

After arriving at a site, we would walk around with a net, sometimes up and down a road, through fields or along the forest edge looking for swallowtails. People often say to me, ‘I picture you frolicking in the fields catching butterflies’. Clearly, they have never gone butterfly catching before.

catching butterflies in nets in the field

Sarah, my field assistant, and I pretending to frolic in the fields catching butterflies.

Catching butterflies is anything but graceful. In fact, some advice I was given before heading to the field was, ‘if you don’t look silly doing it, you’re not doing it right’. Truer words have never been spoken. Swallowtails are very strong fliers; they can fly high and fast. I couldn’t count the number of times a swallowtail has outflown me or made me run in circles. I have chased after falling leaves, fallen on my face, gotten scrapes and bruises, gone through poison ivy, and swarms of deer flies and mosquitos all to get one more sample.

Through many failed attempts, I quickly learned the tricks of the trade. It is much easier to sneak up on swallowtails while they are on a flower feeding on nectar. However if you miss, there is about a 30 second window for you to redeem yourself; otherwise it will likely outfly you. You can also catch them mid-flight or chase after them, but trust me, it is much harder. By mid-field season, my field assistant and I were pro butterfly catchers; sometimes we caught two butterflies in one go and caught well over 600 throughout the season!

Catching butterflies in nets

Each of us (Sarah and I) with some of our proudest catches – catching two butterflies at once!

Once a butterfly was caught, we would carefully take it out of the net, put it in a glassine envelope and in the cooler. Because butterflies are ectothermic, putting them in a cooler does minimal harm – as long as it’s not too cold!

Butterflies tucked away in glassine envelopes being placed in the cooler.

Butterflies tucked away in glassine envelopes being placed in the cooler.

 

holding a butterfly

Butterflies are stronger than you might think.

There are a lot of myths about touching a butterfly’s wings and people always ask how safe it is for the insect. Their wings are covered in a powder-like substance that is actually tiny scales, which gives them their bright colours and patterns. Lepidoptera means ‘scaly wings’. As butterflies age, they lose their scales naturally. Although you don’t want to handle them too much and make them lose their scales faster, holding them by pinching the wings together just behind the head – the strongest part of their wing – is very safe for them.

After a few butterflies were caught, we would bring them to the release site. For each butterfly release, we would take a butterfly from the cooler, sex it, and give it a unique ID in case we caught it again.

The most reliable way to sex a butterfly is like any other animal: look at their sex organs. It can be difficult at times, but lucky for me, swallowtails are large enough that it makes it easy to tell. Females have an ovipositor at the end of their abdomen that they use to lay eggs and they tend to be thicker bodied. Males have claspers at the end of their abdomen that they use to hold on to the female and they tend to be more slender. Claspers make the abdomen pointed and if you prod at them they will open and close

Female Spicebush.

Female Eastern Tiger.

Male Spicebush.

Male Spicebush.

To mark butterflies we simply used a permanent marker to write on their wings. For Eastern Tigers, which are mainly yellow, it was easy to write a number on their underwing. But Spicebush butterflies are mainly black, meaning that any number we wrote would not show up against their wings. However, they have six orange spots on their underwings that we marked in unique patterns.

Marking the butterfly to ID

Some of our butterflies marked with marker. For the Spicebush, we made dots within their spots to make a unique ID.

After recording this information, we would put the butterfly on the ground, wait for it to take off, and follow it using flags and a GPS unit, doing our best not to influence its flight. We did this repeatedly throughout the day. When 5pm rolled around and few butterflies were to be found, we headed back to the field station to make dinner, ending the day with a few beers around the campfire.

I have now completed my Master’s and as it turns out, forest edges are an important landscape feature for these swallowtails. It can be stressful to manage your own research project, but when it’s all said and done, I only have fond memories of spend the hot summer days catching butterflies.

jennaJenna did her bachelors in biology and environmental studies at Queen’s University and successfully completed her master’s at the University of Western Ontario. Since graduating she has been traveling and is now working in the conservation field trying to get outside whenever she can. She has been fortunate enough to work with many different species such as plants, badgers and reptiles, but butterflies remain one of her favourite animals to work with. Check out her website: www.jennasiu.com