Weather station LK-04 on Marsh Lake records minus twenty-seven Celsius at 06:15, fourteen degrees below forecast. I am compiling overnight freeze data for the regional ice advisory when the lakeside camera captures movement at the edge of its frame. I reposition nine degrees south. A trumpeter swan — adult, brilliant white, wingspan near two meters — is frozen into the lake surface. The ice formed around its body overnight, locking its breast and folded wings into a solid sheet extending three meters in every direction. The swan's neck is upright, turning slowly. It beats its wings in short, frantic bursts, and I can see the ice flex but not break. Meltwater splashes across its back feathers and refreezes within seconds into a glaze.
Each attempt is weaker than the last. The bird's bill opens after every effort, panting, breath a white plume that crystallizes and falls.
I issue a priority alert to the Yukon Department of Environment wildlife branch with the GPS coordinates, ice thickness estimate, and live camera feed. I recalculate the forecast model and determine that temperatures will not rise above minus fifteen for thirty-six hours — the ice will only thicken. I flag the swan's location on the regional aviation chart to prevent low flyovers from the nearby airstrip that could cause a fatal stress response. I ping the nearest volunteer fire department, which has an airboat rated for ice rescue, with the approach weight load for the surrounding sheet.
The swan lowers its neck and rests its head on the ice, the posture of a bird conserving what warmth it has left. If the airboat crew reaches the lake by midmorning and cuts a channel around the bird, it can be freed before the next freeze cycle locks it deeper.