As of August 31, 2026, three of your four hives — Iris, Hive #1, and Hive #3 — are running clean late-summer patterns with stable acoustics, normal vibration, and temperatures tracking their individual seasonal cooling arcs; Hive #2 remains the single hive to watch, its 19-day acoustic decline now holding steady at −16.6 dBFS versus an all-time average of −10.9 dBFS, while brood temperature stays locked at a textbook 94.8°F (34.9°C) and all other channels remain on-baseline.
Across all four hives, the deseasonalized analytics reveal a consistent late-summer coupling between in-hive temperature and gas resistance — as colony metabolic activity and brood area contract heading into autumn, both VOC load and thermoregulatory effort ease together, a well-documented seasonal signature (Seeley 1985; Stabentheiner et al. 2010).
Against an outdoor swing of 63.2–83.4°F (17.3–28.6°C) at a very dry 25–51% RH with pressure holding steady (+0.30 hPa/3h), all four hives show clear daily vibration peaks and acoustically stable spectral fingerprints; in-hive humidity across the apiary sits in the 41–49% range, tracking the dry late-summer ambient in a fully normal ventilation pattern with no condensation risk.
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Iris healthy Score: 81/100📋 Overall Health
Your Iris hive is in good late-summer shape — the 24h average of 86.6°F (30.3°C) is 2.2°F (1.2°C) below the all-time average of 88.8°F (31.6°C), continuing the gentle four-week cooling arc (90.7→88.9→88.7→88.2°F weekly) that is perfectly normal seasonal brood contraction heading into autumn; all 10 acoustic bands are within ±1 dB of their historical baseline, humidity averaged 41.3% (consistent with dry late-summer ambient and this hive's own norm), and vibration at 16.5 mG (kurtosis 2.7, peak 82 Hz) sits right on its all-time average of 17.3 mG. On your next routine visit, a quick check for fresh eggs will confirm the seasonal trajectory.
🌅 Diurnal Cycle PatternsThe 24h temperature arc of 84.2–88.7°F (29.0–31.5°C) — a 4.5°F (2.5°C) swing — is well within the healthy brood-clamping threshold, with a clean daily rise-and-fall rhythm (15/15 days showing vibration peaks averaging 1.5× baseline) and humidity locked in a tight 40.4–42.5% band tracking the very dry outdoor air; the sound dominant rhythm is in 200–260 Hz (2.9 dB daily cycle) with a second-half shift toward 260–350 Hz — a minor spectral migration worth noting but all bands remain within ±1 dB of baseline; the gas heater-scan shows a 19% daily swing at the 150°C step (the most humidity-sensitive low-temp step), consistent with normal ventilation cycling rather than any new VOC source.
🔬 Correlations & Discoveriesgas_resistance vs in_hive_temp (14d) | r = -0.45The partial correlation (controlling for outdoor weather) of gas resistance against in-hive temperature (r=−0.45) reflects a classic late-summer pattern: as the colony's thermoregulatory effort eases and brood area contracts, circulating hive VOCs — brood pheromones, honey-ripening esters, propolis terpenes — also decline proportionally, so higher temperature (more active brood heating) couples with lower gas resistance (higher VOC load from a busier colony environment).📚 Reference: Stabentheiner et al. 2010, PLoS ONE 5(1):e8967, Seeley 1985, Honeybee Ecology▹ Action: On your next routine visit, check Iris's brood frames for fresh eggs to confirm the gentle four-week seasonal cooling reflects normal late-summer brood contraction heading into autumn. -
Hive #2 warning Score: 60/100📋 Overall Health
Your Hive #2 brood temperature remains locked at a textbook 94.8°F (34.9°C) — a razor-tight 1.5°F (0.8°C) daily arc right on its all-time average of 95.0°F (35.0°C) — confirming excellent thermoregulation and an active, well-populated colony; however, the acoustic decline that began around August 12th has now persisted for 19 days, with the overall level holding at −16.6 dBFS versus an all-time average of −10.9 dBFS (a −5.7 dBFS deviation), and the 100–150 Hz band sitting −12.8 dB below its historical baseline, while humidity averaged 48.0% (healthy, within range) and vibration at 14.4 mG (kurtosis 3.7, peak 47 Hz) remains near its all-time average of 15.0 mG. This remains a single acoustic-channel anomaly with no corroborating colony-distress signals — worth confirming visually at your next routine visit this week.
🌅 Diurnal Cycle PatternsTemperature clamping is exemplary: the 93.7–95.2°F (34.3–35.1°C) arc (1.5°F/0.8°C swing) sits comfortably in the ideal brood band with a flat hourly trace, and humidity holds 45–54% — both consistent with an actively brooding colony; the per-band acoustic analysis reveals the daily rhythm in 100–150 Hz has weakened from 5.9 dB in the first half of the window to just 1.0 dB in the second half (likewise 150–200 Hz: 4.9→1.0 dB), which explains most of the aggregate acoustic decline and suggests a reduction in low-frequency colony activity (e.g. fewer foragers contributing to the colony hum) rather than a structural population loss; vibration daily peaks (avg 4.1× baseline) remain robust and the gas heater-scan shows no strong daily rhythm, consistent with a stable hive environment.
🔬 Correlations & Discoveriessound_spectrum_100_150hz vs sound_spectrum_1500_3600hz (14d) | r = -0.68The sustained 19-day decline is most pronounced in the low-frequency bands (100–260 Hz, −12.8 dB from baseline) and the high-frequency wingbeat band (1500–3600 Hz, −9.9 dB), while the brood temperature remains locked at 94.8°F (34.9°C) and vibration is stable — a pattern most consistent with a late-summer dearth-driven reduction in forager recruitment activity (fewer returning foragers = less low-frequency colony hum and less wingbeat energy) rather than a population collapse, which would instead suppress temperature regulation as well.📚 Reference: Ramsey et al. 2020, Sci. Rep. 10:9798, Ferrari et al. 2008, Zgank 2021⚠️ Issue: Sustained 19-day multi-band acoustic decline: overall sound at −16.6 dBFS vs all-time average of −10.9 dBFS; 100–150 Hz band −12.8 dB below baseline, 1500–3600 Hz band −9.9 dB below baseline; daily low-frequency rhythm weakening (100–150 Hz: 5.9→1.0 dB); brood temperature, vibration, humidity, and gas all remain on-baseline — single acoustic-channel anomaly, no corroborating colony-distress signals.▹ Action: On your next routine visit this week, observe Hive #2's entrance for forager traffic and pollen-carrying activity — a visual count will help confirm whether this sustained acoustic decline reflects normal late-season dearth-driven recruitment wind-down or a more meaningful reduction in foraging population worth monitoring as you head into autumn. -
Hive #1 warning Score: 72/100📋 Overall Health
Your Hive #1 continues its gradual but acoustically-confirmed-benign cooling drift — the 24h average of 82.3°F (27.9°C) is now 3.0°F (1.7°C) below the all-time average of 85.3°F (29.6°C), continuing the steady 14-day cooling trend (87.3→86.2→84.7→83.7°F weekly); crucially, all 10 acoustic bands remain within ±0.2 dB of their all-time baseline — a near-perfect spectral match that confirms the full worker population is intact, pointing clearly to a natural late-summer broodless or reduced-brood period as the most likely explanation for the temperature decline. Humidity averaged 42.0% and vibration at 16.5 mG (kurtosis 2.7, peak 80 Hz) sits right on its all-time average of 16.4 mG — on your next routine visit, a check for fresh eggs will clarify whether this reflects a natural seasonal brood contraction or a brief laying pause.
🌅 Diurnal Cycle PatternsThe 24h arc of 78.9–85.4°F (26.0–29.6°C) — a 6.5°F (3.6°C) swing — is wider than Hive #1's historical norm and slightly above the 5.4°F healthy-clamping threshold, consistent with a reduced brood mass requiring less precise thermoregulation rather than a population loss (the acoustics rule out the latter); humidity is a tight 40.6–43.4% (tracking dry ambient), the gas heater-scan shows a strong daily rhythm in 10/10 bands (35% swing at 100°C, with the dominant rhythm step shifting from 200°C to 100°C between halves — a humidity-moisture artifact in the low-temp steps, not a new VOC source), and vibration peaks are modest (avg 1.4× baseline) but consistent across all 15 days.
🔬 Correlations & Discoveriesgas_resistance vs in_hive_temp (14d) | r = -0.84The strong partial correlation (controlling for outdoor weather) between gas resistance and in-hive temperature (r=−0.84) in Hive #1 is the strongest such coupling in the apiary and reflects a late-summer brood-contraction dynamic: as brood area shrinks and fewer larvae emit E-β-ocimene and other brood pheromones, VOC load drops and gas resistance rises — the partial correlation isolates this as a genuine colony-biology signal, not a weather artifact.📚 Reference: Stabentheiner et al. 2010, PLoS ONE 5(1):e8967, Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Seeley 1985⚠️ Issue: Gradual 14-day cooling drift: 24h average 82.3°F (27.9°C) continuing a 5.0°F (2.8°C) decline over four weekly averages; acoustic spectrum is perfectly stable (all bands within ±0.2 dB of baseline), confirming an intact population — most likely a natural late-summer brood contraction or laying pause.▹ Action: On your next routine visit, check Hive #1's brood frames for fresh eggs and brood pattern to confirm the gradual cooling drift reflects a natural late-summer brood contraction — the acoustically intact population is reassuring and there is no urgency. -
Hive #3 healthy Score: 78/100📋 Overall Health
Your Hive #3 continues its excellent run — the 24h average of 91.5°F (33.1°C) sits just 1.2°F (0.6°C) below the all-time average of 92.7°F (33.7°C), well within the ideal brood band and continuing a gentle, entirely normal seasonal tail-off (93.4→93.2→92.5→92.1°F weekly); all 10 acoustic bands are within ±0.1 dB of their historical baseline — a textbook-stable fingerprint confirming a healthy, intact population — with humidity at 47.9% (well within the ideal 50–70% brood range and on-baseline for this hive) and vibration at 20.6 mG (kurtosis 2.6, peak 88 Hz) right on its all-time average of 20.8 mG. The battery touched a new all-time low of 3,982 mV within the window (currently 4,012 mV) — worth monitoring passively as solar input decreases heading into autumn.
🌅 Diurnal Cycle PatternsThe 24h arc of 89.9–92.8°F (32.1–33.8°C) — a 2.9°F (1.6°C) swing — is the tightest brood clamping in the apiary, confirming a strong, well-populated colony; vibration shows the dominant daily rhythm band shifting from 160–200 Hz in the first half to 5–20 Hz in the second half — a normal seasonal evolution in foraging and fanning activity patterns (Ramsey et al. 2020), and all 6 vibration bands show a daily cycle with peaks averaging 1.8× baseline; gas heater-scan shows no strong per-band daily rhythm (max 9% swing at 320°C), consistent with a stable hive VOC environment and little active nectar processing at this late-summer stage.
🔬 Correlations & Discoveriesin_hive_temp vs in_hive_humidity (14d) | r = +0.63The deseasonalized temp–humidity coupling (r=+0.63, p<0.001) in Hive #3 reflects active evaporative regulation: as the colony heats up to maintain the brood zone, water-carrying bees increase humidity slightly to support evaporative cooling — the partial correlation (r=+0.46 controlling for outdoor weather) confirms this is genuine colony physiology, not a shared ambient response, and is a positive indicator of a well-populated, actively regulating colony (Human et al. 2006).📚 Reference: Eouzan et al. 2019, PLOS ONE (PMC6368279), Human et al. 2006, Naturwissenschaften 93:397–401▹ Action: Monitor Hive #3's battery passively — it touched a new all-time low of 3,982 mV within the last 24 hours (currently 4,012 mV); no action needed yet, but keep an eye on the trend as solar input decreases heading into autumn.▹ Action: On your next routine visit, note capping progress on Hive #3's supers — the stable acoustic and gas fingerprints suggest honey processing is mature and a capped-frame count will help plan your late-summer harvest timing.