iTonight / Last night — shows confident detections (≥50%) from the current night session. Switches automatically at sunset, around dusk in Threlkeld. If last night had no confident detections (e.g. due to heavy rain or poor conditions), it falls back to showing the most recent night with activity, clearly labelled with its date.
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Species Last Night
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All Time
iConfident detections only — counts detections the BatDetect2 model identified with at least 50% confidence. Lower-confidence possible detections are recorded but excluded from these totals to keep the figures reliable.
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Species Recorded
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Bat of the Night
Most detected species
Waiting for detections...
Nightly Totals
Detections per night · Last 30 days
Species Summary
Tonight
No detections yet
This Week
No detections yet
This Month
No detections yet
This Year
No detections yet
Tonight's Activity
Detections per hour · Last 24 hours
Conditions & Activity
How weather affects bat detections
🌡️ Best TemperatureiBest Temperature — the average evening temperature on nights when bats were detected, weighted by how many detections each night had. Calculated by matching each active bat night to that night's maximum temperature from the garden weather station, so warmer, busier nights count for more. Bats are generally inactive below about 10°C.
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Most active above this
🌧️ Rain ImpactiRain Impact — compares the average number of detections on dry nights versus wet nights (more than 1mm of rain). Each bat night is matched to that night's rainfall from the weather station. Bats hunt far less in rain, as it hampers their echolocation and grounds the insects they feed on.
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Detections on dry vs wet nights
🌙 Moon ImpactiMoon Impact — compares average detections on dark nights (moon less than 30% lit) versus bright, moonlit nights. Each night's moon illumination is calculated from its date. Some bats show "lunar phobia" — avoiding bright nights when they're more visible to predators — though local factors like temperature can mask the effect.
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Lunar phobia effect
Detection Calendar
Last 30 nights · Each square = one night
Species Recorded
All time · Click to filter
Waiting for data...
Recordings
Time-expanded playback · Bat calls shifted into human hearing range