As of September 7, 2026, your apiary is in good shape heading into early autumn — Iris, Hive #1, and Hive #3 all show acoustically stable, fully intact populations on a gentle seasonal cooling arc, while Hive #2 remains the one hive to watch, its broad-spectrum acoustic step-down now at 26 days with brood thermoregulation still locked at a textbook 94.7°F (34.8°C). The gently rising barometric tendency (+1.06 hPa/3h) signals continued clearing conditions and should support good foraging activity.
Across all four hives, the deseasonalized analytics confirm a consistent in-hive temperature ~ humidity coupling (r=+0.41 to +0.59, p<0.05) independent of the shared diurnal cycle — a signature of active hygroregulation where warmer brood-nest air holds more absolute moisture, exactly as Eouzan et al. 2019 and Human et al. 2006 describe for healthy brood-rearing colonies. Hive #2 stands apart with an additional robust in-hive temp ~ gas resistance coupling (r=+0.59), suggesting its elevated VOC load co-varies with brood metabolic activity rather than with any decline signal.
Against outdoor swings of 63.7–89.3°F (17.6–31.8°C) at 18–38% RH, all four hives maintain consistent daily vibration fanning rhythms and in-hive humidity in the 40–50% range — appropriate for the dry September ambient with no condensation risk; Hive #2 alone continues to show absent per-band low-frequency acoustic daily rhythm while all other diurnal channels remain healthy across the apiary.
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Iris healthy Score: 82/100📋 Overall Health
Your Iris hive continues in excellent shape — the 24h average of 88.3°F (31.3°C) sits right on its all-time average of 87.9°F (31.1°C), all 10 acoustic bands are within +0.8 dB of their historical baseline (overall sound −10.5 dBFS vs. all-time −10.9 dBFS), humidity at 40.7% is healthy and consistent with the dry September ambient, gas resistance at 444 kΩ is near its all-time average of 454 kΩ, and vibration at 17.1 mG (kurtosis 2.5, peak 59 Hz) is right on baseline. The gentle 4-week cooling arc from 89.4°F to 88.3°F (31.9→31.3°C) is entirely a natural late-summer brood contraction — watch for fresh eggs at your next routine visit to confirm.
🌅 Diurnal Cycle PatternsIris shows a healthy ±2.5°F (±1.4°C) daily temperature oscillation (24h range 85.7–91.5°F / 29.8–33.0°C) — well within the tight brood-clamping band — with the outdoor thermal lead of ~150 min confirming the colony is actively buffering ambient swings rather than tracking them passively. Vibration fanning spikes are present on all 15 of 15 days (baseline ~16.6 mG peaking to ~24.7 mG, 1.5× daily), humidity holds a remarkably flat 39.9–41.4% (consistent with the dry outdoor 18–38% RH), and the gas heater-scan curve is stable at its all-time shape with a +14% diurnal swing at the 150°C step — consistent with normal propolis/brood volatile cycling. The intraday acoustic rhythm shift from 260–350 Hz toward 200–260 Hz and the vibration dominant rhythm migrating from 5–20 Hz toward 50–80 Hz are modest and consistent with normal foraging-window activity ramp-up.
🔬 Correlations & Discoveriestemperature_in vs humidity_in (14d) | r = +0.52After removing the shared diurnal cycle, in-hive temperature and humidity remain positively coupled (r=+0.52) — warmer brood-metabolic episodes carry more absolute water vapor, consistent with active hygroregulation described by Human et al. 2006; this is a sign of a healthy, brood-rearing colony, not a ventilation problem.📚 Reference: Eouzan, Garnery, Pinto et al. 2019 (PLOS ONE / PMC6368279), Human, Nicolson & Dietemann 2006humidity_in vs gas_resistance (14d) | r = +0.51Higher in-hive humidity co-varies with higher gas resistance (lower VOC load) on the deseasonalized residuals — when bees are fanning more actively for honey ripening or thermoregulation and circulating more moist air, the MOX plate is also more humidity-suppressed, illustrating why gas readings must always be reconciled against the RH channel before any VOC interpretation is made.📚 Reference: Winston 1987, The Biology of the Honey Bee, Burgues & Marco 2018, Sensors 18(2):339▹ Action: On your next routine visit, do a quick check of Iris's brood frames for fresh eggs to confirm the gradual seasonal cooling arc reflects a natural late-summer brood contraction — the perfectly stable acoustics confirm the full population is present. -
Hive #2 warning Score: 55/100📋 Overall Health
Your Hive #2 brood temperature remains locked at a textbook 94.7°F (34.8°C) — a razor-tight 2.2°F (1.2°C) daily arc essentially on its all-time average of 94.8°F (34.9°C) — confirming excellent active thermoregulation; however, the broad-spectrum acoustic step-down that began around August 25th is now at 26 days, with overall sound holding at −16.6 dBFS versus the all-time average of −14.1 dBFS (−2.5 dBFS below baseline), the 100–150 Hz band sitting −5.4 dB below baseline and the 1500–3600 Hz band −4.4 dB below baseline. Humidity at 48.0% is healthy and within its all-time range, gas resistance at 42 kΩ is near its all-time average of 47 kΩ, vibration at 14.0 mG (kurtosis 2.9, peak 56 Hz) is on its all-time average of 14.9 mG with impressive daily fanning spikes (baseline ~12.4 mG peaking to ~50.7 mG, 4.1×) — the combination of locked brood thermoregulation and vigorous vibration alongside a persistent, non-recovering multi-band acoustic step-down warrants a visual confirmation at your next routine inspection this week.
🌅 Diurnal Cycle PatternsHive #2 shows the tightest brood clamping of any hive in the apiary — a compressed 93.6–95.8°F (34.2–35.5°C) daily arc (1.6°F / 0.9°C oscillation) confirming intensive thermoregulatory control — while the per-band acoustic rhythm is essentially absent (max 1.0 dB diurnal swing at 100–150 Hz), a pattern that has persisted since the August 25 changepoint. Vibration fanning shows a strong daily cycle across all 6 bands (5-20 Hz dominant, 5.0 dB swing; dominant band shifting 20–50 Hz → 80–120 Hz through the day), confirming active colony fanning behaviour; the gas heater-scan shows only 1/10 bands with a daily rhythm (100°C step, +14% swing) with a −11% band-energy shift at the 100°C step, consistent with a modest VOC load reduction. Humidity at 45.8–50.2% is healthy and stable, with no condensation risk.
🔬 Correlations & Discoveriestemperature_in vs gas_resistance (14d) | r = +0.59In-hive temperature and gas resistance are positively coupled on deseasonalized residuals (r=+0.59) — warmer brood metabolic states generate more brood pheromones (E-β-ocimene) and propolis/wax volatiles, reducing MOX resistance; at this hive's current baseline of ~42 kΩ (near its all-time average of ~47 kΩ), the VOC load is within normal range for an active brood-rearing colony and is not a standalone concern.📚 Reference: Stalidzans et al. 2017, Maisonnasse et al. 2010, PLoS ONE 5(10):e13531sound_energy vs temperature_in (14d) | r = +0The sustained acoustic step-down (changepoint ~August 25, now 26 days, −2.5 dBFS overall with the low-frequency 100–260 Hz bands most affected) is decoupled from brood temperature, which remains rock-solid at 94.7°F (34.8°C) — this pattern is inconsistent with a simple population collapse (which would also cool the brood) but is consistent with a shift in colony acoustic character, such as a post-swarm requeening event where a reduced forager cohort maintains full brood thermoregulation; a physical inspection to observe entrance traffic and confirm queen/brood status will resolve the picture.📚 Reference: Ramsey, Bencsik, Newton et al. 2020, Sci. Rep. 10:9798, Kanelis et al. 2023, Biology 12(11):1392⚠️ Issue: Sustained 26-day multi-band acoustic step-down: overall sound −16.6 dBFS vs. all-time average −14.1 dBFS (−2.5 dBFS); 100–150 Hz band −5.4 dB below baseline, 1500–3600 Hz band −4.4 dB below baseline; changepoint confirmed ~August 25; brood temperature, vibration, humidity, and gas all remain on-baseline.▹ Action: On your next routine visit this week, observe Hive #2's entrance for forager traffic and pollen-carrying activity, then check brood frames for fresh eggs and queen presence — the 26-day acoustic step-down is the one signal worth confirming visually, and the rock-solid 94.7°F (34.8°C) thermoregulation and vigorous vibration fanning spikes (peaking 4.1× above baseline daily) are genuinely reassuring that the colony is actively caring for brood. -
Hive #1 healthy Score: 80/100📋 Overall Health
Your Hive #1 is tracking beautifully — all 10 acoustic bands show essentially perfect spectral stability (all per-band deltas within ±0.1 dB of the all-time baseline, overall sound −16.3 dBFS vs. all-time −16.4 dBFS), the 24h average of 82.0°F (27.8°C) continues a gradual and acoustically confirmed-benign cooling drift now at −1.7°F (−0.9°C) below the all-time average of 83.7°F (28.7°C), humidity at 44.8% is healthy and slightly above its all-time average of 41.9%, gas resistance at 500 kΩ is near its all-time average of 516 kΩ, and vibration at 16.3 mG (kurtosis 2.8, peak 58 Hz) is exactly on its all-time average of 16.3 mG. The 14-day cooling drift from 86.0°F to 82.0°F (30.0→27.8°C) with acoustically perfect stability is a natural late-summer brood contraction — a check for fresh eggs at your next routine visit will confirm this seasonal trajectory.
🌅 Diurnal Cycle PatternsHive #1 shows a healthy ±3.2°F (±1.8°C) daily temperature oscillation (24h range 78.5–86.0°F / 25.8–30.0°C), with the outdoor thermal lead of ~230 min confirming strong colony buffering of ambient swings. Vibration fanning spikes are present on all 15 of 15 days (baseline ~15.9 mG peaking to ~23.1 mG, 1.5×), humidity holds a flat 44.0–46.2% (well above the dry outdoor 18–38% RH, consistent with active hygroregulation), and the gas heater-scan shows a strong full-spectrum diurnal rhythm (all 10 steps cycling, dominant swing at the 100°C step +41%) — the most pronounced gas daily cycle in the apiary, likely reflecting the active VOC turnover of a large brood nest. No per-band acoustic daily rhythm is present, and vibration dominant rhythm centers on 80–120 Hz, consistent with normal fanning activity.
🔬 Correlations & Discoveriesgas_resistance vs temperature_in (14d) | r = -0.81Controlling for outdoor temperature, gas resistance and in-hive temperature are strongly inversely coupled (partial r=−0.81) — when the brood nest warms above its baseline (heater-bee activity, fanning for ripening), volatile output rises and MOX resistance drops; this is the strongest hive-specific metabolic coupling in the apiary and confirms a large, active brood nest where temperature drives VOC production, not any pathological process.📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Burgues & Marco 2018, Sensors 18(2):339humidity_in vs gas_resistance (14d) | r = +0.47Higher in-hive humidity co-varies with higher gas resistance on deseasonalized residuals — fanning events that raise humidity also ventilate volatiles outward, temporarily reducing the in-hive VOC load and raising MOX resistance; this is a healthy ventilation-metabolism coupling, not a humidity or gas concern.📚 Reference: Winston 1987, The Biology of the Honey Bee, Eouzan, Garnery, Pinto et al. 2019▹ Action: On your next routine visit, check Hive #1's brood frames for fresh eggs to confirm the 14-day cooling drift (86.0→82.0°F / 30.0→27.8°C) reflects a natural late-summer brood contraction — the acoustically perfect spectral match (all bands within ±0.1 dB of baseline) is fully reassuring and there is no urgency. -
Hive #3 healthy Score: 74/100📋 Overall Health
Your Hive #3 continues its excellent run — all 10 acoustic bands are within ±0.1 dB of their historical baseline (a textbook-stable fingerprint, overall sound −16.3 dBFS vs. all-time −16.3 dBFS), the 24h average of 90.2°F (32.4°C) continues a gentle and entirely normal seasonal tail-off now at −1.7°F (−0.9°C) below the all-time average of 91.9°F (33.3°C), humidity at 45.8% is right on its all-time average of 46.8%, gas resistance at 93 kΩ is essentially on its all-time average of 93 kΩ, and vibration at 20.5 mG (kurtosis 2.6, peak 92 Hz) is right on its all-time average of 20.7 mG. The battery touched a minimum of 3,980 mV during the 24h window, matching its all-time low of 3,978 mV — worth monitoring passively as September solar input continues to decline.
🌅 Diurnal Cycle PatternsHive #3 shows a healthy ±1.9°F (±1.1°C) daily temperature oscillation (24h range 87.7–92.2°F / 30.9–33.4°C), with the outdoor thermal lead of ~160 min confirming active colony buffering. Vibration fanning spikes are present on all 15 of 15 days (baseline ~19.4 mG peaking to ~34.8 mG, 1.8×), with the dominant vibration rhythm migrating from 5–20 Hz to 160–200 Hz across the day — consistent with a transition from low-frequency DVAV recruitment signals earlier in the active period to higher-frequency fanning as foraging peaks. Humidity holds a flat 44.1–46.9% (consistent with stable hygroregulation), gas heater-scan shows no strong per-band daily rhythm (max +9% swing at 250°C) suggesting a stable, well-cured honey-stores environment, and no per-band acoustic daily rhythm is present.
🔬 Correlations & Discoveriestemperature_in vs humidity_in (14d) | r = +0.59Hive #3 shows the strongest in-hive temperature ~ humidity coupling of the three hives (r=+0.59 on deseasonalized residuals), consistent with a large brood mass where warmer metabolic states generate more water vapor from larval respiration and honey ripening — a positive indicator of healthy brood rearing activity heading into autumn.📚 Reference: Eouzan, Garnery, Pinto et al. 2019 (PLOS ONE / PMC6368279), Human, Nicolson & Dietemann 2006temperature_in vs gas_resistance (14d) | r = +0.49In-hive temperature and gas resistance are positively coupled (r=+0.49) — as the brood nest warms, brood pheromones and propolis terpenes increase, reducing MOX resistance; at its current baseline of ~93 kΩ (essentially on its all-time average), Hive #3's VOC environment is stable and consistent with normal late-summer brood activity, with the dry September ambient keeping overall volatile concentrations moderate.📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Bankova et al. 2000, Apidologie 31:3–15▹ Action: Monitor Hive #3's battery passively — it touched 3,980 mV during the last 24 hours, essentially at its all-time low of 3,978 mV; no action needed yet, but keep an eye on the trend as September solar input continues to decrease.