Verification Review

Quality Assessment & Manual Verification Results
74
Species Verified
82.2%
Overall Pass Rate (74/90)
4,023
Verified Detections
21
High-Priority Reviews

Verification Summary

βœ… Passed Verification

74 species passed manual review and biological verification
Methods: Spectrogram inspection, audio playback, biological plausibility screening
Verified

❌ Failed Verification

8 species rejected as biologically impossible
Reasons: Nocturnal woodpeckers, oceanic seabirds inland, non-native species, seasonal impossibilities
Rejected

High-Priority Detections Requiring Review

21 detections flagged for expert review due to low confidence (<0.5) combined with rarity (single detection).

River Warbler (Locustella fluviatilis)

πŸ“Š Confidence: 0.254 | ⏰ Time: 2025-10-14 07:24:24
🚩 Reason: Low confidence + rare species
Needs Review

Common Raven (Corvus corax)

πŸ“Š Confidence: 0.262 | ⏰ Time: 2025-10-14 18:10:20
🚩 Reason: Low confidence + rare species
Needs Review

Common Goldeneye (Bucephala clangula)

πŸ“Š Confidence: 0.265 | ⏰ Time: 2025-10-13 17:25:59
🚩 Reason: Low confidence + rare species
Needs Review

Eurasian Eagle-Owl (Bubo bubo)

πŸ“Š Confidence: 0.381 | ⏰ Time: 2025-10-15 12:07:33
🚩 Reason: Low confidence + rare species
Needs Review

...and 17 additional species requiring review. Full list available in verification_review_full.json

Species That Failed Verification

Great Bittern (Botaurus stellaris)

πŸ“Š Detections: 129 (all rejected)
πŸ“ˆ Confidence Range: 0.25-0.91
❌ Reason: Rain drops hitting microphone mimicked booming calls
πŸ’‘ Lesson: Demonstrates challenge of wet-weather acoustic monitoring
All False Positives

European Storm-Petrel (Hydrobates pelagicus)

πŸ“Š Detections: 4
❌ Reason: Marine species unlikely at inland wetland
πŸ’‘ Assessment: Likely insect or bat ultrasonic calls
Habitat Mismatch

Common Loon (Gavia immer)

πŸ“Š Detections: 5
❌ Reason: Low confidence, habitat mismatch
πŸ’‘ Assessment: Could not confirm from spectrograms
Unconfirmed

Manx Shearwater (Puffinus puffinus)

πŸ“Š Detections: 3
❌ Reason: Marine species, extreme habitat mismatch
πŸ’‘ Assessment: Rejected - wrong habitat
Marine Species

Black Woodpecker (Dryocopus martius)

πŸ“Š Detections: 2 (all nocturnal)
❌ Reason: Nocturnal detections - biologically impossible (diurnal species)
πŸ’‘ Assessment: No evidence of nocturnal calling in literature
Temporal Impossibility

Common Grasshopper-Warbler (Locustella naevia)

πŸ“Š Detections: 59 (all rejected)
❌ Reason: Seasonal impossibility - summer visitor, departs by late September
πŸ’‘ Assessment: October presence extremely unlikely, spectrograms showed rain noise
Seasonal Impossibility

Corn Crake (Crex crex)

πŸ“Š Detections: 1
❌ Reason: Seasonal impossibility - should be in Africa by mid-October
πŸ’‘ Assessment: Long-distance migrant, October presence biologically implausible
Seasonal Impossibility

Confidence Distribution

High Confidence (β‰₯0.7)

37 species
Includes: Graylag Goose (0.99), Spotted Crake (0.99), Great Snipe (0.96)
High Quality

Medium Confidence (0.5-0.7)

27 species
Acceptable quality, manually verified
Verified

Low Confidence (<0.5)

18 species
Requires additional verification
Review Needed

Verification Methods

  • Visual Spectrogram Inspection: All detections reviewed in Raven Pro with expert interpretation
  • Audio Playback: Enhanced audio clips played back for acoustic confirmation
  • Reference Comparison: Cross-referenced with Xeno-Canto reference recordings
  • Habitat Validation: Species occurrence validated against Norwegian distributions
  • Temporal Pattern Verification: Nocturnal/diurnal activity patterns checked for biological plausibility
  • Geographic Range Verification: Confirmed species presence in Norwegian populations

Quality Metrics

81
Spectrograms Generated
81
Audio Clips Enhanced
81
Manual Reviews Completed
45
Cross-Validated Species