Initial upload: ONNX-converted BattyBirdNET regional bat classifiers

README.md

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+---
+license: cc-by-nc-sa-4.0
+language:
+- en
+tags:
+- onnx
+- bioacoustics
+- bat-detection
+- birdnet
+- echolocation
+- wildlife
+datasets:
+- xeno-canto
+- chirovox
+pipeline_tag: audio-classification
+library_name: onnxruntime
+---
+
+# BattyBirdNET ONNX Models
+
+ONNX-converted regional bat species classifiers from [BattyBirdNET-Analyzer](https://github.com/rdz-oss/BattyBirdNET-Analyzer), optimized for inference with ONNX Runtime.
+
+These are lightweight classification heads trained on [BirdNET](https://github.com/birdnet-team/BirdNET-Analyzer) v2.4 embeddings using transfer learning. They identify bat species from ultrasonic echolocation recordings.
+
+## How It Works
+
+BattyBirdNET uses a two-stage inference pipeline:
+
+1. **BirdNET v2.4** extracts 1024-dim embeddings from audio
+2. **Regional bat classifier** (this repo) maps embeddings to bat species
+
+The "slow-down trick": bat recordings at 256 kHz are fed directly to BirdNET without resampling. BirdNET's spectrogram pipeline (trained on 48 kHz bird audio) treats the samples as 48 kHz, shifting ultrasonic bat calls (20-120 kHz) into the audible frequency range where its learned features work.
+
+## Model Variants
+
+Three precision formats are provided for each regional classifier:
+
+| Format | Directory | Use Case |
+|--------|-----------|----------|
+| FP32 | `fp32/` | Standard precision for GPU and desktop CPU |
+| FP16 | `fp16/` | Half precision for Raspberry Pi 5, modern GPUs |
+| INT8 | `int8/` | Quantized for low-power devices, embedded ARM |
+
+## Available Regions
+
+| Region | Model | Species | Coverage |
+|--------|-------|---------|----------|
+| Bavaria | `BattyBirdNET-Bavaria-256kHz` | 32 | Germany, Central Europe |
+| Bavaria (high) | `BattyBirdNET-Bavaria-256kHz-high` | 24 | Germany, stricter thresholds |
+| EU | `BattyBirdNET-EU-256kHz` | 30 | Broad European coverage |
+| Scotland | `BattyBirdNET-Scotland-256kHz` | 11 | Scotland |
+| South Wales | `BattyBirdNET-SouthWales-256kHz` | 29 | South Wales |
+| Sweden | `BattyBirdNET-Sweden-256kHz` | 23 | Sweden, Nordic |
+| UK | `BattyBirdNET-UK-256kHz` | 20 | United Kingdom |
+| USA | `BattyBirdNET-USA-256kHz` | 38 | United States (full) |
+| USA East | `BattyBirdNET-USA-EAST-256kHz` | 23 | Eastern United States |
+| USA East (high) | `BattyBirdNET-USA-EAST-256kHz-high` | 17 | Eastern US, stricter thresholds |
+| USA West | `BattyBirdNET-USA-WEST-256kHz` | 28 | Western United States |
+
+## Model Architecture
+
+- **Input**: `[batch, 1024]` float32 (BirdNET v2.4 embedding vectors)
+- **Output**: `[batch, N_species]` float32 (raw logits, apply sigmoid for probabilities)
+- **Activation**: Sigmoid (same as BirdNET)
+- **Labels**: One species per line in corresponding `_Labels.txt` file
+
+## Usage with Birda (Rust CLI)
+
+```bash
+# Install models
+mkdir -p ~/.local/share/birda/models/bat/
+cp fp32/BattyBirdNET-Bavaria-256kHz_fp32.onnx ~/.local/share/birda/models/bat/
+cp labels/BattyBirdNET-Bavaria-256kHz_Labels.txt ~/.local/share/birda/models/bat/
+
+# Run bat detection
+birda analyze -m birdnet-v24-embeddings --bat bavaria bat_recording.wav
+```
+
+See [birda](https://github.com/tphakala/birda) for full documentation.
+
+## Usage with Python (ONNX Runtime)
+
+```python
+import numpy as np
+import onnxruntime as ort
+
+# Load BirdNET v2.4 (with embeddings exposed) and bat classifier
+birdnet = ort.InferenceSession("birdnet-v24-embeddings.onnx")
+bat_model = ort.InferenceSession("fp32/BattyBirdNET-Bavaria-256kHz_fp32.onnx")
+
+# Load 256kHz bat audio (144,000 samples = 0.5625s)
+audio = np.random.randn(1, 144000).astype(np.float32)  # replace with real audio
+
+# Stage 1: Extract embeddings
+outputs = birdnet.run(None, {"input": audio})
+embeddings = outputs[1]  # [1, 1024]
+
+# Stage 2: Classify bat species
+logits = bat_model.run(None, {"input": embeddings})[0]
+scores = 1 / (1 + np.exp(-logits))  # sigmoid
+
+# Load labels
+with open("labels/BattyBirdNET-Bavaria-256kHz_Labels.txt") as f:
+    labels = [line.strip() for line in f if line.strip()]
+
+for i, (label, score) in enumerate(zip(labels, scores[0])):
+    if score > 0.1:
+        print(f"{label}: {score:.1%}")
+```
+
+## Conversion Details
+
+Converted from BattyBirdNET-Analyzer v1.0 TFLite models using [birdnet-onnx-converter](https://github.com/tphakala/birdnet-onnx-converter):
+
+- TFLite to ONNX via tf2onnx (opset 17)
+- Optimized with onnxslim (graph simplification, dynamic batching)
+- FP16 and INT8 quantization via onnxconverter-common and onnxruntime
+
+## Audio Requirements
+
+- **Sample rate**: 256 kHz (standard for AudioMoth and similar bat detectors)
+- **Chunk size**: 144,000 samples (0.5625 seconds at 256 kHz)
+- **Overlap**: 25% recommended (36,000 samples)
+- **Format**: WAV recommended; FLAC, MP3 also supported
+
+## Training Data Sources
+
+The original BattyBirdNET models were trained on data from:
+
+- [NABat Machine Learning](https://sciencebase.gov) (North America)
+- [xeno-canto](https://xeno-canto.org) (bird and bat recordings)
+- [ChiroVox](https://www.chirovox.org) (public bat call library)
+- [Animal Sound Archive Berlin](https://www.museumfuernaturkunde.berlin) (Humboldt University)
+
+## License
+
+CC-BY-NC-SA-4.0 (non-commercial use only), following the original BattyBirdNET-Analyzer license.
+
+## Citation
+
+If you use these models, please cite:
+
+- [BattyBirdNET-Analyzer](https://github.com/rdz-oss/BattyBirdNET-Analyzer)
+- [BirdNET-Analyzer](https://github.com/birdnet-team/BirdNET-Analyzer) (Kahl et al.)
+
+## Acknowledgments
+
+- [rdz-oss](https://github.com/rdz-oss) for the original BattyBirdNET-Analyzer and trained models
+- [BirdNET team](https://github.com/birdnet-team) at Cornell Lab of Ornithology for the BirdNET v2.4 backbone
+- [birdnet-onnx-converter](https://github.com/tphakala/birdnet-onnx-converter) for TFLite-to-ONNX conversion and optimization

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labels/BattyBirdNET-Bavaria-256kHz-high_Labels.txt

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+Barbastella barbastellus_Western barbastelle
+Eptesicus nilssonii_Northern bat
+Eptesicus serotinus_Serotine bat
+Hypsugo savii_Savis pipistrelle
+Myotis bechsteinii_Bechsteins bat
+Myotis dasycneme_Pond bat
+Myotis daubentonii_Daubentons or Whiskered bat
+Myotis emarginatus_Geoffroys bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered or Daubentons bat
+Myotis nattereri_Natterers bat
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus kuhlii_Kuhls or Nathusius pipistrelle
+Pipistrellus nathusii_Nathusius or Kuhls pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus auritus_Brown or Grey long eared bat
+Rhinolophus ferrumequinum_Greater horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat social
+Vespertilio murinus_Parti-coloured bat
+insect
+mechanical

labels/BattyBirdNET-Bavaria-256kHz_Labels.txt

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+Barbastella barbastellus_Western barbastelle
+Eptesicus nilssonii_Northern bat
+Eptesicus serotinus_Serotine bat
+Hypsugo savii_Savis pipistrelle
+Myotis bechsteinii_Bechsteins bat
+Myotis dasycneme_Pond bat
+Myotis daubentonii_Daubentons or Whiskered bat
+Myotis emarginatus_Geoffroys bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered or Daubentons bat
+Myotis nattereri_Natterers bat
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus kuhlii_Kuhls or Nathusius pipistrelle
+Pipistrellus nathusii_Nathusius or Kuhls pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus auritus_Brown or Grey long eared bat
+Rhinolophus ferrumequinum_Greater horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat social
+Vespertilio murinus_Parti-coloured bat
+audiomoth
+background
+bird
+collected
+electrical
+insect
+mechanical
+other
+pro
+rain

labels/BattyBirdNET-EU-256kHz_Labels.txt

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+Barbastella barbastellus_Western barbastelle
+Eptesicus nilssonii_Northern bat
+Eptesicus serotinus_Serotine bat
+Hypsugo savii_Savis pipistrelle
+Miniopterus schreibersii_Common bent-wing bat
+Myotis alcathoe_Alcathoe bat
+Myotis bechsteinii_Bechsteins bat
+Myotis brandtii_Brandt bat
+Myotis capaccinii_Long-fingered bat
+Myotis dasycneme_Pond bat
+Myotis daubentonii_Daubentons bat
+Myotis emarginatus_Geoffroys bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered bat
+Myotis nattereri_Natterers bat
+NOISE
+Nyctalus lasiopterus_Greater noctule bat
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus kuhlii_Kuhls pipistrelle
+Pipistrellus maderensis_Madeira pipistrelle
+Pipistrellus nathusii_Nathusius pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus spec._Long eared bat
+Rhinolophus blasii_Blasius horseshoe bat
+Rhinolophus ferrumequinum_Greater horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat
+Tadarida teniotis_European free-tailed bat
+Vespertilio murinus_Parti-coloured bat

labels/BattyBirdNET-Scotland-256kHz_Labels.txt

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+Myotis brandtii_Brandt bat
+Myotis daubentonii_Daubentons bat
+Myotis mystacinus_Whiskered bat
+Myotis nattereri_Natterers bat
+NOISE
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus nathusii_Nathusius pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus spec._Long eared bat

labels/BattyBirdNET-SouthWales-256kHz_Labels.txt

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+Barbastella barbastellus_Barbastelle
+Conocephalus dorsalis_Short-winged conehead
+Conocephalus fuscus_Long-winged bush-cricket
+Eptesicus serotinus_Serotine
+Leptophyes punctatissima_Speckled bush-cricket
+Metrioptera brachyptera_Bog bush-cricket
+Muscardinus avellanarius_Hazel dormouse
+Myotis bechsteinii_Bechstein's bat
+Myotis brandtii_Brandt's bat
+Myotis daubentonii_Daubenton's bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered bat
+Myotis nattereri_Natterer's bat
+Nyctalus leisleri_Leisler's bat
+Nyctalus noctula_Noctule
+Pholidoptera griseoaptera_Dark bush-cricket
+Pipistrellus nathusii_Nathusius' pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus auritus_Brown long-eared bat
+Plecotus austriacus_Grey long-eared bat
+Rattus norvegicus_Brown rat
+Rhinolophus ferrumequinum_Greater horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat
+Sorex araneus_Common shrew
+Sorex minutus_Eurasian pygmy shrew
+Tettigonia viridissima_Great green bush-cricket
+Vespertilio murinus_Parti-coloured bat
+noise

labels/BattyBirdNET-Sweden-256kHz_Labels.txt

@@ -0,0 +1,23 @@
+Barbastella barbastellus_Western barbastelle
+Eptesicus nilssonii_Northern bat
+Eptesicus serotinus_Serotine bat
+Myotis bechsteinii_Bechsteins bat
+Myotis dasycneme_Pond bat
+Myotis daubentonii_Daubentons or Whiskered bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered or Daubentons bat
+Myotis nattereri_Natterers bat
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus kuhlii_Kuhls or Nathusius pipistrelle
+Pipistrellus nathusii_Nathusius or Kuhls pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus auritus_Brown or Grey long eared bat
+Tettigoniidea_Cricket
+Vespertilio murinus_Parti-coloured bat
+audiomoth
+background
+noise
+other
+silence

labels/BattyBirdNET-UK-256kHz_Labels.txt

@@ -0,0 +1,20 @@
+Barbastella barbastellus_Western barbastelle
+Myotis bechsteinii_Bechsteins bat
+Myotis daubentonii_Daubentons or Whiskered bat
+Myotis myotis_Greater mouse-eared bat
+Myotis mystacinus_Whiskered or Daubentons bat
+Myotis nattereri_Natterers bat
+Nyctalus leisleri_Lesser noctule
+Nyctalus noctula_Common noctule
+Pipistrellus nathusii_Nathusius or Kuhls pipistrelle
+Pipistrellus pipistrellus_Common pipistrelle
+Pipistrellus pygmaeus_Soprano pipistrelle
+Plecotus auritus_Brown or Grey long eared bat
+Rhinolophus ferrumequinum_Greater horseshoe bat
+Rhinolophus hipposideros_Lesser horseshoe bat
+Tettigoniidea_Cricket
+audiomoth
+background
+noise
+other
+silence

labels/BattyBirdNET-USA-256kHz_Labels.txt

@@ -0,0 +1,38 @@
+Antrozous pallidus_Pallid bat
+Corynorhinus townsendii_Townsends big-eared bat
+Eptesicus fuscus_Big brown bat
+Euderma maculatum_Spotted bat
+Eumops perotis_Greater mastiff bat
+Idionycteris phyllotis_Allens big-eared bat
+Lasionycteris noctivagans_Silver-haired bat
+Lasiurus blossevillii_Western red bat
+Lasiurus borealis_Eastern red bat
+Lasiurus cinereus_Hoary bat
+Lasiurus intermedius_Northern yellow bat
+Lasiurus seminolus_Seminole bat
+Lasiurus xanthinus_Western yellow bat
+Myotis austroriparius_Southeastern myotis
+Myotis californicus_California bat
+Myotis ciliolabrum_Western small-footed myotis
+Myotis evotis_Western long-eared bat
+Myotis grisescens_Gray bat
+Myotis leibii_Eastern small-footed bat
+Myotis lucifugus_Little brown bat
+Myotis septentrionalis_Northern long-eared bat
+Myotis sodalis_Indiana bat
+Myotis thysanodes_Fringed bat
+Myotis velifer_Cave bat
+Myotis volans_Long-legged bat
+Myotis yumanensis_Yuma bat
+Nycticeius humeralis_Evening bat
+Nyctinomops femorosaccus_Pocketed free-tailed bat
+Nyctinomops macrotis_Big free-tailed bat
+Parastrellus hesperus_Canyon bat
+Perimyotis subflavus_Tricolored bat
+Tadarida brasiliensis_Brazilian free-tailed bat
+Tettigoniidea_Cricket
+background
+noise
+noise-us
+other
+silence

labels/BattyBirdNET-USA-EAST-256kHz-high_Labels.txt

@@ -0,0 +1,17 @@
+Corynorhinus townsendii_Townsends big-eared bat
+Eptesicus fuscus_Big brown bat
+Lasionycteris noctivagans_Silver-haired bat
+Lasiurus borealis_Eastern red bat
+Lasiurus cinereus_Hoary bat
+Lasiurus intermedius_Northern yellow bat
+Lasiurus seminolus_Seminole bat
+Myotis austroriparius_Southeastern myotis
+Myotis grisescens_Gray bat
+Myotis leibii_Eastern small-footed bat
+Myotis lucifugus_Little brown bat
+Myotis septentrionalis_Northern long-eared bat
+Myotis sodalis_Indiana bat
+Nycticeius humeralis_Evening bat
+Perimyotis subflavus_Tricolored bat
+Tadarida brasiliensis_Brazilian free-tailed bat
+Tettigoniidea_Cricket

labels/BattyBirdNET-USA-EAST-256kHz_Labels.txt

@@ -0,0 +1,23 @@
+Corynorhinus townsendii_Townsends big-eared bat
+Eptesicus fuscus_Big brown bat
+Lasionycteris noctivagans_Silver-haired bat
+Lasiurus borealis_Eastern red bat
+Lasiurus cinereus_Hoary bat
+Lasiurus intermedius_Northern yellow bat
+Lasiurus seminolus_Seminole bat
+Myotis austroriparius_Southeastern myotis
+Myotis grisescens_Gray bat
+Myotis leibii_Eastern small-footed bat
+Myotis lucifugus_Little brown bat
+Myotis septentrionalis_Northern long-eared bat
+Myotis sodalis_Indiana bat
+Nycticeius humeralis_Evening bat
+Perimyotis subflavus_Tricolored bat
+Tadarida brasiliensis_Brazilian free-tailed bat
+Tettigoniidea_Cricket
+background
+collected
+noise
+noise-us
+other
+silence