Macnamara Field Naturalists' Club

Macnamara Field Naturalists' Club Connect and share your knowledge and love of nature between meetings. Post your observations, experiences and photos. Ask questions! Help it grow.

The Macnamara Club has an amazing pool of people representing many specialties. See http://www.mfnc.ca/ Following in the footsteps of naturalist and photographer Charles Macnamara, the Macnamara Club has explored, documented and enjoyed the rich natural history of the Lower Ottawa Valley since the club's founding in 1984. Over the years, club members have been active in the fields, forests and wat

erways and contributed time and effort to local natural treasures. The creation of the Macnamara Nature Trail is one of their largest projects to date. Located in the southeast corner of Arnprior, the trail's boardwalks, viewing platforms, and benches allow visitors to explore it without disturbing its wild character, offering a window into the past and present natural world of the Lower Ottawa Valley. The club is currently fundraising to add an extension to offer access to the wetland connecting the current trail on the south side of the wetland to the mixed forest on the north side by McLean Avenue. Members meet the first Tuesday of every month except July and August at the Arnprior Curling Club, 15 Galvin Street, in Arnprior. Expert speakers share their knowledge and take members in easy steps into their special worlds. Field trips throughout the year investigate everything from geology, to birds in migration, to rare orchids. The club maintains an appealing website with a photo gallery, information on key initiatives such as the Macnamara Nature Trail and Gillies Grove, and updates on the club activities.

Many orthopteran species mate in late summer. The Carolina Locust (poorly named for it is found in Canada and is not a l...
09/04/2026

Many orthopteran species mate in late summer. The Carolina Locust (poorly named for it is found in Canada and is not a locust) perhaps is better called the Black-winged Locust.

The males fly up and hover to show a potential mate their striking hind wing pattern. This one looked not unlike a Flamenco dancer!

09/03/2026

Nurse logs sustain new life including trees, ferns and salamanders such as this Eastern Newt. You don't have to 'clean up' fallen trees in the forest ;) ! 8/29/26photo

The origins of Lake Ontario.
09/02/2026

The origins of Lake Ontario.

Another light has left us. He was a poet, naturalist, and environmentalist.When despair for the world grows in meand I w...
09/01/2026

Another light has left us. He was a poet, naturalist, and environmentalist.

When despair for the world grows in me
and I wake in the night at the least sound
in fear of what my life and my children’s lives may be,
I go and lie down where the wood drake
rests in his beauty on the water, and the great heron feeds.
I come into the peace of wild things
who do not tax their lives with forethought
of grief. I come into the presence of still water.
And I feel above me the day-blind stars
waiting with their light. For a time
I rest in the grace of the world, and am free.
- Wendell Berry

Is there a poet who resonates with you about our natural world?

Because of all the rain, Lobster Mushrooms are abundant this year. These delicious mushrooms are actually composed of tw...
08/31/2026

Because of all the rain, Lobster Mushrooms are abundant this year. These delicious mushrooms are actually composed of two fungi.

The orange colour is due to the hard tissue of a parasitic fungus (Hypomyces lactifluorum) that covers the body of a mushroom (either a Russula or a Lactarius)!

Join the Macnamara Field Naturalists’ Club for an exhilarating evening on Wednesday, September 2nd at 7 p.m. at Emmanuel...
08/30/2026

Join the Macnamara Field Naturalists’ Club for an exhilarating evening on Wednesday, September 2nd at 7 p.m. at Emmanuel Anglican Church, 287 Harrington St, Arnprior, Ontario.

Non-members are welcome to attend with a $5 donation to support the club.

Experience an incredible presentation by Barry Goodman on Shark Diving, exploring the thrilling world of sharks in the Bahamas and the Caribbean.

Discover fascinating facts and debunk myths about these magnificent creatures.

Don’t miss this exciting event—an unforgettable night of adventure and discovery.

08/28/2026

An extra, protective eyelid.

Who doesn’t love this stuff?
08/28/2026

Who doesn’t love this stuff?

There's a plant along every damp trail edge and creek bank in the East that offers the single most delightful ten seconds in American botany — and generations of kids have been inducted into it by a grinning grandparent saying just two words: "Touch it."

I'm jewelweed. Also known — for excellent reasons you're about to learn — as TOUCH-ME-NOT.

💥 THE EXPLOSION: By late summer and fall, my plump little seed pods hang ripe and loaded. Brush one — barely — and it DETONATES: the pod walls, held under tension like a wound spring, split and CURL back violently in a fraction of a second, catapulting seeds up to six feet in all directions while the spent coils dangle like tiny party streamers. The mechanism (explosive dehiscence — real term) is one of the fastest movements in the plant kingdom.
→ It never stops being fun. Adults who "just want to show the kids" will strip a whole patch. The plant's counting on exactly that — you're the seed dispersal.
→ Bonus party trick: my seeds, peeled of their coat, are robin's-egg BLUE and taste like walnuts

💎 THE NAME: rain and dew bead into silver jewels on my water-repellent leaves — and a leaf held underwater turns shining MERCURY-silver. Jewelweed, earned twice.

🌺 THE FLOWERS: orange-gold trumpets with red freckles, dangling like earrings — and one of the most important late-season NECTAR stations for hummingbirds (my flower shape is practically hummingbird-fitted; ruby-throats fuel fall migration on jewelweed thickets — post #4's travelers stop here) plus bumble bees

🌿 THE FOLK-MEDICINE TWIST — the part every old-timer mentions: for centuries, the crushed juice of my succulent stems has been THE traditional field remedy rubbed on fresh poison ivy contact, nettle stings, and bug bites. Native nations used me first; every rural family since kept the knowledge. Science's verdict is genuinely mixed-to-modest (some studies suggest the mash may help wash/bind urushiol if used immediately — soap and water remains the gold standard from post #84; it won't fix an established rash). But the POETRY is undefeated: I grow, reliably and abundantly, in the exact damp edges where poison ivy and stinging nettle grow. The folk-remedy grows next to the problem. Nature's little apology, say the old-timers.

📋 WHERE & WHEN: moist shade — creek banks, ditch lines, trail edges, wet woodland borders — in dense head-high stands. Pods are loaded late summer through fall. I'm a native annual; every popped pod is next year's patch.

Go find a patch this week. Bring a kid. Say the two words.

Watch their face at the detonation — that's a nature-lover being manufactured in real time.

Share this with someone who needs ten seconds of pure delight. 💥🧡

Cool.
08/28/2026

Cool.

Your backyard is running a security system right now, and at least four species are staffing it. Every bird and mammal within earshot eavesdrops on alarms from animals it's never met.

The chickadee is the encoder. Her "chick-a-dee-dee-dee" is a data feed: the more dee notes she tacks on, the more dangerous the predator. A big slow hawk gets two or three. A small fast owl gets ten or more. Every nuthatch, titmouse, and sparrow nearby decodes it instantly.

The blue jay is the perimeter alarm. She mimics a hawk scream well enough to freeze every small bird around her. One call, two seconds, the feeders empty.

🐾 The chipmunk works the ground. A rapid chip means ground predator. A long trill means something overhead. Everyone reacts without stopping to check.

The crows are enforcement. They mob predators, remember faces for years, and pass the ID to crows who never saw the threat.

08/28/2026

🔎 Out on the water? Keep an eye out for this tiny invader!

The Spiny Waterflea may be small, but it can have a big impact on aquatic ecosystems.

What to look for: A long tail with up to four spines and a round egg pouch on its abdomen. They can often be found in large, jelly-like clusters.

Why it matters: Spiny Waterfleas can compete with native fish for food, contribute to declining fish populations, and clog fishing lines and gear.

🌊 Spot an invasive species? Report your sighting through Ottawa Riverkeeper’s Survey123.

Want to test your knowledge? Visit our website and try our invasive species identification quizzes!





🔎 Vous êtes sur l’eau? Gardez l’œil ouvert pour repérer ce minuscule envahisseur!

La puce d’eau en hameçon est peut-être petite, mais elle peut avoir des impacts importants sur les écosystèmes aquatiques.

Comment l’identifier : Une longue queue munie de jusqu’à quatre épines et une poche à œufs arrondie sur l’abdomen. On peut souvent la retrouver en grands amas gélatineux.

Pourquoi est-elle préoccupante? La puce d’eau en hameçon peut concurrencer les poissons indigènes pour la nourriture, contribuer au déclin de leurs populations et s’accumuler sur les lignes et le matériel de pêche.

🌊 Vous repérez une espèce envahissante? Signalez votre observation dans Survey123 de Garde-rivière des Outaouais.

Envie de tester vos connaissances? Visitez notre site Web et essayez nos quiz d’identification des espèces envahissantes!

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Arnprior, ON

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