Category Archives: insect

Insect

More Spring goodness!

Despite the early April snow, our native plants are showing courage and beginning to grow.  Yesterday, I visited the colony of Skunk Cabbage, Symplocarpus foetidus, Aracacae, that grows south-west of Orangeville right alongside a well-travelled road. (You can see the road gravel thrown off the roadside by the snow ploughs in one of the photos.)

Skunk Cabbage mottled red spathe surrounding the developing spadix inside (photo by Mark Whitcombe) .

Skunk Cabbage is a fascinating plant with several quite unusual adaptations to getting an early start in Spring. Its upper parts are capable of generating a significant amount of heat:  15+ Celsius degrees above ambient air temperature! This added heat seems to accomplish several functions simultaneously. It means that Skink Cabbage can literally melt its way through snow. It means that the warmth inside the flower helps keep the early pollinators basking in the extra heat, hanging around and maximizing the chance that they will transfer pollen to the benefit of the plant. It also means that the rising warm air spreads the pungent smell that comes from broken leaves and from the   spadix as it flowers. The rising warm air may also enable a small amount of wind pollination!

Skunk Cabbages are related to Jack-in-the-Pulpit, and share several general features. The cut or bruised vegetation releases a pungent smell. Plants have important underground storage organs, a corm for Jack-in-the-Pulpit, and a huge rhizome (an extended corm, I suppose — or perhaps the other way round:  a corm is a shortened underground stem or rhizome) for Skunk Cabbage. Supposedly, the rhizomes of the Skunk Cabbage can reach 30 cm in diameter! While Jack-in-the-Pulpit corms are poisonous, and Skunk Cabbage is not, both species were important Spring or Fall food sources for indigenous peoples, who learned how to prepare the edible portions by drying or baking before consumption.

The other major feature shared between the plants of the Aracaceae is that the flower is wrapped by a spadix or surrounding leaf-like structure, and has as its central core a spathe, a spike-like structure that holds either the male or the female parts.  In the first picture of the Skunk Cabbages, the lovely red-mottled spathe surrounds a thick paler yellowy-brown spadix down inside.

By the way, I knelt down in the marsh beside the road to smell these Skunk Cabbages — and they didn’t yet smell.  Not quite ready for action!

Skunk Cabbage mottled red spathe surrounding the developing yellowy spadix protected inside  (photo by Mark Whitcombe) .

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An update after our early Spring snowstorm!

I went out mid-day on Friday April 7th as the sun was beginning to warm up the air and melt the snow that had blown in on top of the sprouting Skunk Cabbages.  They seemed to be having no trouble with the weather — it had only gotten just below the freezing point, after all.  But they were certainly not melting any snow yet.  I suspect that’s because the air temperature is still too cool for any insects to be flying.  Somehow the plants seem to understand to get ready, but not to actually push forward on actual flower development.

Surviving under the snows of our our early April blizzard

 

Credit Valley BioBlitz Registration is now open!

Guided Blitz Registration is now open!

Join us for the 2016 Ontario BioBlitz in the Credit River Watershed on June 11-12!

The Guided BioBlitz is an opportunity for less-experienced nature enthusiasts to learn a bit more about their favourite species through field surveying and identification techniques – important skills for understanding the world around us. Our 2015 flagship event in the Don Watershed was a big success. Thanks to the 700+ registered participants and volunteers – we couldn’t do it without you!

The Guided BioBlitz is open to all ages and all experience levels, but be aware that sessions can require a lot of walking. Please also note that there can be a 40 minute drive between Guided BioBlitz sites.

Visit http://www.ontariobioblitz.ca/guided-registration.html to register for sessions, look at the map of the Guided Blitz sites, and download a copy of the schedule.

Most sessions are limited to 30 people per group, and will fill up quickly – so make sure to register early! Participants will be contacted with more information about their particular session shortly after registration closes, on May 20th, 2016.

As always, if you have any questions, comments, or concerns, we would be happy to answer them – just send us an e-mail at  ontariobioblitz@gmail.com, or visitwww.ontariobioblitz.ca for more info.

Interesting sessions with the Oak Ridges Moraine Land Trust

Whether you’d like to participate in this spring’s Bio Blitz or learn more about the wildflowers or dragonflies, butterflies and moths in your backyard, you might be interested in these events organized by neighbours to the east — the Oak Ridges Moraine Land Trust. www.oakridgesmoraine.org 

Wildflowers of York Region – April 11th

Spring is almost here. What is sprouting in the forests and meadows around Aurora? Learn about native wildflowers, how to grow them, and where you can expect to see them.

Location:  Aurora Public Library, Magna Room Monday April 11th from 7pm  9pm.  Space is limited so please pre-register with the Oak Ridges Moraine Land Trust at 905-853-3171 ext 30 or at Landtrust@oakridgesmoraine.org

Dragonflies, Butterflies and Moths – Oh My! – May 16th

So many things are buzzing in the neighbourhood. Come and learn about some of the most beautiful things with wings in York Region.

Location:  Aurora Public Library, Magna Room Monday May 16th from 7pm  9pm.  Space is limited so please pre-register with the Oak Ridges Moraine Land Trust at 905-853-3171 ext 30 or at Landtrust@oakridgesmoraine.org

The Upper Credit Field Naturalists Club

The Upper Credit Field Naturalists Club is made up of people who share a common interest in the natural environment: enjoying it, preserving it, and learning more about it, in all of its incredible complexity and beauty.

  • We organize a variety of activities throughout the year, including the ever-popular Spring and Christmas bird counts, wildflower walks and other field trips.
  • We hold regular monthly meetings which are our cornerstone activity.
  • We also publish to members as quarterly members’ newsletter, The Bluebird, which contains club news, details of upcoming speakers and field trips, and articles on wildlife and the environment.
  • The membership form is here.

For more about us, check our ABOUT page.

Dragonfly exuvia BeechLake

Dragonfly exuvia, from a Swift River Cruiser, Macromia illinoiensis.  The white tubes are the trachea which connect the developing body of the adult inside the nymphal case through to the outside air as the nymph ceases to use its gills while it comes out of the water to emerge. I had the wonderful privilege of watching and filming thIs take more than 4 hours to come out of the lake, find a spot to anchor itself, and go through the slow orderly sequence of emergence, finally flying away as an adult.   (Photo by Mark Whitcombe)