Siblings create large artworks in secret locations in northern B.C.

From the ground, the work of Gitxsan artistsAlex and Michelle Stoney might look like little more than a collection of driftwood and rocks scattered along the shore.

But from the air, in photos taken with a drone,lines and forms emerge to reveal large-scale Indigenous artworks.

The pieces, known as formlines, have been created at secret sites along the Bulkley and Skeena rivers. But photos of the creations have been shared all over social media.

The idea for the project came to artist Alex Stoney while he was walking with his dog along the river's edge.

"I noticed these circles made from rocks. Some were larger than others," the Gitxsan photographer said. "That's when it clicked:a northwest coast formlinein rocks and other natural materials would look amazing."

Alex headed back to the site with his artist sister, Michelle Stoney, and, with the help of Alex's wife, they began creating Indigenous images from whatever the earth provides.

Waves, wind and runoff do the initial work, and inspire the imageryon each specific site the team stumbles upon.

The team begins by drawing an outline of the image with sticks in the sand.Immovable boulders and logs can form a foundation; growing plants add spots of colour to the composition.

Then the hard work begins.Rocks and driftwood and materials found nearby are moved into place.

Alex Stoney then captures the image from the air using drones.

They first work they created, The Hand,took over 16 hours to complete.

A storm or high water can destroy the art overnight.Impermanence is an intended part of the art.

So, why bother doing it?

"It gives me a sense of accomplishment, a feeling of doing something with my hands," Alex StoneytoldCBC Daybreak North's Carolina de Ryk.

Their second and most recent design, the profile of a woman,came from a subtle shoreline shift and was created with Mother's Day in mind.

"The driftwood had moved and it kind of had formed a wavy line. Michelle thought that line looked like hair, and gave her the inspiration to create a design that looks like a woman with wavy hair," said Alex.

The family is familiar with using gifts of the earth in theirart. Michelle Stoney's carved pumpkins get rave reviews on social media.

Alex is now working with ateacher in Kispioxwho wants to create a formline with their class.

And the team willget back to the riverbanks this summer to tackle the complex design of a spawning fish.

"That's probablygoing to be the most difficult design we've done to date," he said. "I'll look forward to doing it."

Tap the link below to hear Alex Stoney's interview on Daybreak North: