From L-R Agapostemon virescens; Giant Patiagonian bumblebee (Bombus dhalbomii) pinned; Eastern Carpenter bee (Xylocopa virginica)

We managed to weave bees into our family trip to Toronto. We observed metallic green and large, shiny black bees in our relative’s backyard, and visited university bee labs where we saw and learned a lot more.

First stop was a coffee with professor Nigel Raine at Guelph University (just outside Toronto). I know Nigel from when he was researching bumblebee behaviour at Royal Holloway in London 15 years ago. He does a lot more than that now, but some recent research coming out of his lab has discovered (by accident) bumblebee queens’ resilience to flooding. Read it here.

A few days later we were at University of Toronto Scarborough, the campus to the east of the city, to meet Scott MacIvor (above) an assistant professor who specialises in urban ecology. Working with with a range of disciplines including designers, engineers and city planners his lab investigates patterns in biodiversity (especially bees), biological invasion and ecological processes in cities to better connect people to nature, support urban conservation priorities and sustain ecosystem service delivery. There are lots of overlapping interests in the work we do at Urban Bees to try to improve cities for bees.

He has created a bee hotel for cavity-nesting bees using paper straws with different diameter holes mounted on a clay mould and encased in a protective plastic cover. He is concerned about the mail order business in mason bee cocoons which he fears will spread disease and parasites.

His research has found that pollinator diversity and abundance decreases on a green roof the taller a building. However surveys by Pollinating London Together seem to show otherwise in the City of London where green roofs planted with diverse, sequential blooming flowers have been found to outperform ground level gardens which are often shaded by the tall buildings surrounding them and therefore not so attractive to foraging pollinators, especially bees.

Scott studied under Laurence Packer, one of the leading professors of melittology (study of bees) in the world. I’ve read some of the Laurence’s books and had taken Bees of the World with me to be signed. We arranged to meet him in his world famous Packer Lab at York University in Toronto where he has one of the biggest bee collections.

He showed us the bee he discovered in the arid desert in northern Chile in 2012. (Laurence is pointing to the location on the map above). It is the only bee of its kind ever found. It’s called Xenofidelia colorada (pictured above right) and is a member of the Fideliinae family, a subfamily of Megachilidae, which includes leafcutter bees.

He he also showed us a male orchid bee, Euglossa intersecta, (above left) with an exceptionally long proboscis allowing it to access nectar deep in the corollas of certain flowers including some deep-throated orchids. They also collect scent from the flower using special brushes on their front legs. They store the scent in their hind legs. This ‘perfume’ is used to attract a female.

Most exciting for me, I got to see a Giant Patagonian bumblebee (Bombus dahlbombii), know as the flying mouse because of the size of the queen – up to 4cm – and her fluffy, brown coat. She is the biggest bumblebee in the world and I wrote and article a few years ago about her future is threatened by the trade in European bumblebees to pollinate polytunnel crops in Chile and Argentina.

We also saw one of the smallest bees in the world, Pedita minima (2 photos above), – a solitary bee from south west USA desert which measures just less than 2mm – which we mention in A Good Bee.

It was a real treat to hang out with Laurence in his lab for a couple of hours hearing his stories and looking at some of his huge collection of bees. He also gave us a couple of books including Keeping the Bees , all about his adventures tracking down wild bees around the world.

We also observed the Common Eastern bumblebee (Bombus impatiens) throughout Toronto, where most of the front gardens (which are actually owned by the council) were full of flowers, especially Golden rod and Michaelmas daisies at this time of year. And #NoMowMay had been adopted. Even in parks, the planting was incredibly similar to the UK, with their native Rudbeckia and Golden Rod (Soligado canadensis) proving late forage, along with Sedum. Golden Rod and Sumac trees (Rhus typhina), which I’d only seen in ornamental planting, grow wild here along railway lines – like Buddleia in the UK – and the ravines that cross the city.

The green roofs we visited seemed less advance than the UK. The 3rd floor of City Hall, know as the Podium, (left) has been planted with  trays of mainly sedum, which were grown off-site and then installed on the rooftop. When we visited in September, asters were flowering but not much else. Canada geese were feeding on some seeds. I couldn’t see what they were. Much more impressive was the 2,000 sq ft Carrot Common garden, (right) on top of a health food shop, showcasing urban agriculture with a huge allotment, a large area that seemed to be full of pollinator-friendly flowers, and areas for people to gather and learn, with planting on top of the benches too.

I was blown away by the city’s ravine system which gives it a feeling of being a city built within a huge forest. Within one of those ravines was the Evergreen Brickworks built on the site of the former Don Valley Brick Works and quarry, with the land around it being managed for wildlife with ponds and grazing by goats.

And the new 40 hectre Biidaasige park – created by renaturalising the Don river to create a floodplain and parks for wildlife and people as part of the city’s flood recovery, to improve water quality and redirect the sewage system. I love the translation of the name of the park “sunlight shining towards us”. It seemed very appropriate when we took the photo above of the sun starting to set in the west. We were lucky enough to get a cycle tour of this new area of the city (reminiscent of the Olympic Park on the Lea Valley in east London) by associate director of the Toronto and Region Conservation Authority, Steve Heuchert (whose sister is a good friend on ours in London). Here’s an interesting article in the Guardian about the huge project a few years ago.

And finally, I have to mention the Blue Jays and the Monarch butterflies. The former is a noisy bird, like our Magpies, but more elusive (hence the not very good photo), and the name of its baseball team. The latter is the butterfly that famously migrates nearly 3,000 miles from the northern United States and southern Canada (where they breed) all the way down to central Mexico (where they overwinter). And we saw a tiny bit of this in action, when we observed Monarch’s on the beach at Lake Erie and on the ornamental plants on the Toronto islands. It was quite a magical experience to see a group (collective noun is kaleidoscope) of butterflies in the wild – Monarchs and Red Admirals. I’ve only experienced it before in an enclosed butterfly house.