Model Card — Greater Sage-Grouse (Centrocercus urophasianus)
Single-class detection model for Greater Sage-Grouse, fine-tuned from the Ultralytics YOLO26s backbone (pretrained on COCO).
Model file: yolo26s_finetuned_sage_grouse_by_J.Gong_uwyo_2026-05-28.pt
Training Details
| Property | Value |
|---|---|
| Base model | yolo26s.pt (COCO pretrained, Ultralytics) |
| Architecture | YOLO26s |
| Input size | 640 × 640 |
| Epochs | 150 |
| Optimizer | MuSGD, lr=0.002, momentum=0.9 |
| Augmentation | mosaic=1.0, degrees=10°, scale=0.5, fliplr=0.5, hsv_h/s/v |
| Device | NVIDIA RTX 5000 Ada Generation (32 GB, CUDA 12.8) |
| Training date | 2026-05-28 |
| Author | Jian Gong, University of Wyoming |
Dataset
Images sourced from iNaturalist (research-grade observations). Bounding boxes generated by MegaDetector v5a (confidence ≥ 0.15). Split 80 / 10 / 10 train / val / test.
| Split | Images |
|---|---|
| train | 204 |
| val | 25 |
| test | 26 |
Performance
Evaluated on the held-out validation set (best checkpoint).
| Metric | Value |
|---|---|
| mAP50 | 0.8300 |
| mAP50-95 | 0.6485 |
Usage
from ultralytics import YOLO
model = YOLO("models/sage_grouse/yolo26s_finetuned_sage_grouse_by_J.Gong_uwyo_2026-05-28.pt")
results = model.predict("image.jpg", conf=0.25)
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