My Adventures with Tree Syrup


Almost all of our maple syrup comes from sugar maples, but you can tap any kind of maple for syrup. Sugar maples tend to have sweeter sap (between two and three percent sugar) than other species.

Silver Maples

I live in a swampy area, with lots of silver maples. That was my first experiment. I tapped a few medium to very large trees in or at the edge of the swamp, including one that I had to walk across ice to get to (later in the season I visited that one by canoe!). The verdict: Good syrup, slightly less sap sugar content (than sugar maple sap), but since these trees were in the open with big crowns, their sap was fairly sweet! The sap to syrup ratio ranged from 41:1 (great) to 52:1 (not bad), and the sap I measured on March 20, 2021 had a sugar content of 2.6% (very good).

A beautiful Silver Maple Leaf in fall, notice the deeply cut notches.

Norway Maples

Norway maples were brought to North America by settlers; they are hardy and survive well in urban settings. Unfortunately they have become invasive, often taking over natural areas especially within city limits. Their syrup that I made was very tasty, and the sap:syrup ratio was surprisingly good, about 37:1. Sugar maple, for example, is often around 40:1 (40 buckets collected to get one bucket of sap). I believe that the large crown of the Norway maple that I tapped allowed for a higher sap sugar content. The fact that Norway maple is a good syrup tree has significance since that opens up tapping in many urban areas where they thrive (but permission needed, of course, if the trees aren’t on your land.)

Norway Maples have been planted in various urban settings, including as shade trees for parking lots.

Black Walnut

I heard from a colleague that this species makes good syrup, so I had to try it! I tapped three trees, a good size but not really big (about 30 cm diameter). I started late, well into March, and the sap quantity was very low, just a total of 2.3 litres. But the syrup tasted great (below right), some people said it had a nutty flavour, and the 51:1 sap:syrup ratio was fairly good. I’m definitely going to try again. Be cautious, of course, if you have a nut allergy.

Birch Syrup

This blew me away. Birches are tapped commercially in Canada; their syrup is VERY expensive (and I found out why!). And it’s also not for everyone; in my experience, there are people who LOVE it, and people who HATE it. It’s got a strong flavour, some people say a bit like black licorice (and I mean the real stuff, not Twizzlers).

So, why is it expensive? Well, the best sap:syrup ratio I got was 112:1 – so lots of collecting and lots of boiling for not much syrup! The first time I checked the sap sugar content with a refractometer, I thought it was 0 since it was so much lower than my maple sap. Fortunately a colleague took a look and figured it was around 0.5%.

I tapped four white birch trees and two yellow birch trees. Except for two of the white birches, which gave moderate sap quantity, I was astounded by the flow of sap from birches. The other four trees often gave me a full bucket per day, sometimes more!

The sap flow is later than maple; I started in late March and continued well into April.

I even tried my hand at making birch candy from the syrup; again, some people loved it and others…. well…

My advice? Try birch syrup before tapping to make sure it’s for you!

Below left: Tapping White Birch; Below right: the result after much boiling! (one container of yellow birch syrup and two of white birch syrup)

Meeting a rattlesnake

As I was walking a trail at Georgian Bay Islands National park, I was startled by a buzzing right beside me. It was a Massasauga Rattlesnake! I’m sure it was more startled than I was. They are venomous, but only two people have died from their bites in Ontario, and neither of them were treated in a hospital.

This species is very shy, and bites are rare, but hospitals in the area where they live (around Georgian Bay, which is part of Lake Huron) stock antivenin (an antiserum containing antibodies against venom, in this case rattlesnake venom). I have been told by experts that the best first aid is the key to your car (in other words, just go to a local hospital.) Massasauga venom is strong but they don’t deliver much of it, and there is enough time to get to a hospital for treatment.

One theory about why rattlesnakes “rattle” as a warning is that they lived among large herds of animals, like bison, and had to avoid being stepped on – therefor the warning rattle!

Massasauga rattlesnakes eat mostly small mammals, like mice, so they are valuable rodent control. They are listed as “threatened” in Ontario’s Endangered Species Act, due to habitat loss and persecution. People have learned not to kill them, and protecting habitats where they live and supporting conservation groups like Ontario Nature are ways to help this amazing species of snake.

Scared by a passing human, this Massasauga Rattlesnake rattled (sounds like a buzz) as a warning to stay back.

fall colours in spring?

Green chlorophyll is already masking other colours in these dogwood leaves, but other pigments are showing in young Silver Maple leaves.

It can’t rival the splendour of autumn, but for a brief window in spring we see a rebirth of fall leaf colours. Last fall, green chlorophyll faded to reveal the brilliant orange, yellow and red of other pigments. In spring, especially with some tree species, after leaves burst from buds there’s a short time before the green of chlorophyll takes over again, and other pigments temporarily take centre stage.

Green chlorophyll has yet to hide other colours in new spring White Oak leaves,


Spotted like the cat they are named after, Leopard frogs emerge from their muddy bed below ice and water to join nature’s amphibian spring chorus. The mating call of the males is beautiful (at least to female leopard frogs), a mix of snoring, rattling, and grunting, and it adds to the magic of spring in a wetland. After mating, these frogs disperse to grassy areas, and are called meadow frogs in parts of the United States.

A male leopard frogs snores, rattles and grunts to attract a mate.

sweet treat from the wild

When spring gives winter a bit of a shake, when puddles are frozen during cold nights, but melt during warm days, it’s maple syrup season! Tapping pierces the outer and inner bark of the maple tree, and sap in the (you guessed it) sapwood drips out into buckets. The freezing and thawing of sap in maple trees creates pressure (up to half that of a car tire) and pushes the sap, drop by drop, out of the tree. It tastes just a bit sweet – about two to three percent sugar.

Sugar Maples are renowned for their sweet sap. Other maples, like Black, Norway, Silver, Red and Manitoba can also be tapped. Black Walnut syrup tastes like very similar to maple syrup, some say with a hint of a nutty flavour. Birch trees can also be tapped, starting about when maple syrup season ends in early spring.

For some kitchen fun, you can turn maple syrup into maple sugar! Pour some syrup into a pot, then bring to a gentle boil. At 125 degrees C, it’s time to take it off the heat, stir it like crazy for several minutes, the pour it out onto a candy mold or a flat pan. The sugar is warm and delicious! Long ago, indigenous people and settlers (when they learned the trick) made mostly maple sugar, since it was much more portable and easier to store than maple syrup. It was their only source of sugar!

backyard snakes

In most of Canada, our common back yard snake is the Garter snake. Often mistakenly called Garden snakes, these beautiful reptiles can be found in gardens, on lawns, in fields and forests, and almost every other habitat. They are harmless to humans, but definitely not harmless to their favourite food, which includes worms, frogs and toads. In turn, they might fall prey to hawks, raccoon or skunks, so they are an important link in food chains.

Cool Garter Snake facts:

They are so named because they resemble garter belts (which were used to hold up socks and stockings before elastic material was used instead).

Like all snakes, they smell with their tongues.

They (and some other Canadian snakes) are born live. Eggs are held within the mother’s body until they hatch. This is termed (big word of the day!) ovoviviparous reproduction.

How to pick up a crayfish and not get pinched

In almost every stream and river, and some ponds, we have “miniature lobsters”. Much smaller, but packing muscular pincher claws that they use to catch their prey and defend themselves, crayfish patrol our water systems. During the day, most are usually found under rocks (a few, like Digger crayfish, are in underground and underwater tunnels), but at night they creep out and look for food. Like nature’s janitors, they clean up by eating anything decaying (like dead fish, dead leaves and algae), and will also eat whatever small animals they can catch. In turn, they are tasty snacks for raccoons, mink, herons, fish like bass and catfish, and many other predators. In other words, they are important links in aquatic food chains.

Take a look for crayfish under rocks in a local stream or river (kids should always be with an adult near rivers, of course). All you need is a net or even a kitchen sieve, and a container to put them in. And you can tell male from female easily – just check out the video. Males have enlarged swimmerets under their tail that extend forward under their back legs (for depositing sperm). Try picking them up, and see if you can tell the difference! Don’t forget to put the rocks back where you find them, and release the crayfish (and other critters you may discover) soon.

Male Crayfish – note the enlarged, orange-tipped swimmerets curling forward (towards the left on picture) between back legs (absent on females)

The ones in the videos are probably Common crayfish. Unfortunately in some areas of Ontario Rusty crayfish have been released. These larger crustaceans have reddish patches on either side of their cephalothorax, and black-tipped claws. They can out-compete and sometimes replace our native species. It’s important to never release crayfish (or other animals) far from where they were found or purchased for bait or pets.

bald is beautiful

Warming in the morning sun, a Turkey Vulture prepares for a day aloft.

Turkey Vultures are AMAZING to watch. Their flight seems effortless; they hardly every flap their wings and use updrafts from cliff areas and sun-heated ground to patrol the skies. They’re on the lookout for dead animals, so they are a valuable part of nature’s cleanup crew. If you see what looks like a black hawk soaring it’s probably a turkey vulture. To stabilize themselves, they fly with their wings angled up just a bit in a shallow V (jet aircraft also have this). Feathers splay out at wingtips to reduce drag during flight. And they rock back and forth as they fly, reacting to air turbulence. With their fairly light bodies and large wings, they have the lightest wing-loading (ratio of body weight to wing surface) of all of our raptors (birds of prey), which helps them stay in the air without using much energy.

A Turkey Vulture soars along the Niagara Escarpment

So why are they bald? Well, with just a beak to gorge on dead and often rotten flesh, it would be a tough job to keep head feathers clean. When seen from a distance, they almost seem “headless” when compared to hawks and eagles whose feathers make their heads seem quite large. Unlike many birds, they have an excellent sense of smell – quite an advantage when searching out tasty (and smelly) rotting dead animals!

It’s mid-morning on a beautiful June day, and a Turkey Vulture is ready to start its dead animal patrol.

Over the past decades, Turkey Vulture numbers have increased greatly in our area. Rattlesnake Point Conservation Area (run by Conservation Halton) is a great place to see them, and you can often look down on Turkey Vultures as they soar along the cliff. They are especially numerous all along the Niagara Escarpment, but they are seen everywhere in southern Ontario from early spring to late fall.

Watch for: their rocking flight, splayed-out feathers at the tips of their wings, dihedral wing position (shallow V), small-looking head (no feathers!)

Giant silkmoths!

In southern Ontario, June is the month for Giant Silkmoths to emerge! Since late last summer, all through the winter and most of the spring, they are in the pupa stage of development, wrapped in silken cocoons. Finally, in late spring, the adult moths push their way out of the cocoon, climb up a bit and pump fluids into their wings. They are beautiful and very big – the Cecropia is the largest moth north of Mexico! Polyphemus, Luna and Promethea are other Giant Silkmoths in our area (southern Ontario).

At night, a newly-emerged female emits a pheromone that attracts males from up to a kilometre away! Males have wide, feathery antennae to detect the female’s pheromones, while females have much narrower antennae. After mating, the female lays up to a few hundred eggs on tree leaves that the caterpillars will feed on.

The newly-hatched caterpillars are insatiable eaters and grow quickly; if a human baby grew as fast it would weigh as much as an elephant after only a couple of months!

Finally, in late summer, the caterpillar spins a cocoon to protect it through the cold winter months, and it changes into a pupa.

Raising Giant Silkmoths

Raising these amazing moths has been a hobby of mine for many years. I give cocoons to school classes so they can observe the amazing life cycle of these moths. If you live within an hour or so of Guelph, Ontario, contact me to get a cocoon if you would like to observe this.

Finding these moths can be a challenge! They only live for a week or two as adults, and they fly at night. People often mistake them for bats. The caterpillars are camouflaged and are often high in trees. I have sometimes found Cecropia cocoons on tree branches in winter.

Cecropia cocoons on an icy tree

tiger beetles: tiny and fierce

In late spring and summer, look for Tiger beetles as you walk through nature. The Six-spotted Tiger Beetle is like a shining, iridescent jewel – beautiful to us but deadly to small insects and other invertebrates. They are great for gardens since they attack and eat many insect pests! Their large, compound eyes give them great vision, and their huge jaws are perfect for grabbing and munching their prey.

Six-spotted Tiger Beetles are beautiful, tiny and fierce, and great to have in your back yard.