Upload a Tree Photo

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How It Works

1. Upload

Snap a photo of any PNW tree - bark, needles, leaves, cones, or the whole silhouette.

2. Analyze

An EfficientNetV2 neural network trained on 15,000+ community-verified photos examines your image.

3. Identify

Get the top species matches with confidence scores, from Douglas Fir to Pacific Madrone.

40 PNW Species

From the coastal fog belt to the high Cascades, the Pacific Northwest hosts one of the most diverse temperate forests on Earth. This model recognizes 40 native tree species across two groups.

22 Conifers

Cone-bearing trees with needles or scale-like foliage. These dominate the PNW landscape.

Douglas Fir Western Red Cedar Sitka Spruce Western Hemlock Mountain Hemlock Ponderosa Pine Lodgepole Pine Western White Pine Sugar Pine Noble Fir Grand Fir Subalpine Fir Pacific Silver Fir White Fir Incense Cedar Alaska Yellow Cedar Port Orford Cedar Engelmann Spruce Western Larch Western Juniper Pacific Yew Coast Redwood

18 Broadleaf Trees

Flowering trees with flat, broad leaves. Many are deciduous, adding fall color to PNW forests.

Big Leaf Maple Vine Maple Red Alder White Alder Pacific Madrone Oregon White Oak Canyon Live Oak Oregon Ash Black Cottonwood Quaking Aspen Pacific Dogwood Tanoak California Laurel Paper Birch Golden Chinquapin Cascara Buckthorn Pacific Willow Bitter Cherry

Behind the Scenes

Curious how this works under the hood? Here's the short version. For the full technical deep-dive, visit the Background page.

Data from iNaturalist

Every training image comes from iNaturalist, a citizen science platform where naturalists worldwide share and verify species observations. We used ~400 research-grade (community-verified) photos per species from Oregon, Washington, and British Columbia - roughly 15,500 images total.

Transfer Learning

Rather than training from scratch, we start with EfficientNetV2-S, a neural network pretrained on 1.28 million ImageNet images. It already recognizes textures, shapes, and patterns - we just teach the final layers what PNW trees look like using a two-phase training approach.

How Predictions Work

Your photo is resized and fed through the neural network, which outputs a confidence score for each of the 40 species. The top matches are shown with their probabilities.