AI Beehive Health Report — 2026-07-25

As of July 25, 2026, your four-hive apiary continues through peak July heat in strong overall shape — Hive #3 and Hive #2 maintain exceptional brood-core clamping, Hive #1 remains acoustically pristine for a tenth consecutive report, and Iris carries the apiary's one open question: a persistent broad-spectrum acoustic elevation above her own baseline that continues to warrant a brood-and-queen check this week.

All four hives show the classic psychrometric inverse between in-hive temperature and humidity (warmer core → lower RH%), with Hive #3 (r=−0.77) and Hive #1 (r=−0.43) both registering this as a genuine deconfounded colony-physiology signal — a healthy sign of active broodnest thermoregulation rather than drying conditions, consistent with Human et al. 2006 and Ellis et al. 2008.

All four hives show repeatable daily fanning-vibration peaks (14–15 of 15 days with clear spikes) and stable 14-day acoustic energy; Hive #2 and Hive #3 lead in brood-core thermal clamping with sub-1°F oscillations, while Iris and Hive #1 ride wider but structurally normal arcs driven by peak-season ambient heat, with outdoor temps ranging 70.6–90.5°F (21.5–32.5°C) and low 35.7% RH consistent with the dry July ambient all hives reflect.

• Iris warning Score: 57/100
  📋 Overall Health

  Your Iris hive remains fully populated and acoustically vigorous — sound averaged −10.3 dBFS vs. all-time avg −10.7 dBFS (+0.4 dB, well within baseline), confirming an intact worker population — but the persistent broad-spectrum acoustic elevation continues: 100–150 Hz +7.0 dB, 1500–3600 Hz +6.8 dB, 150–200 Hz +5.1 dB, and 800–1500 Hz +4.1 dB all remain elevated above her own all-time baseline across multiple consecutive reports, temperature averaged 90.2°F (32.3°C) with a 3.9°F (2.2°C) daily oscillation (all-time avg 90.0°F / 32.2°C, +0.2°F / +0.1°C, stable), and humidity averaged 48.3% (range 46.5–49.6%), consistent with dry July ambient. A brood-and-queen check this week remains the priority open question for Iris.

  🌅 Diurnal Cycle Patterns

  Temperature cycles cleanly between 88.6–92.5°F (31.4–33.6°C) — a 3.9°F (2.2°C) arc that is well within the healthy-brood clamping threshold — with outdoor leading in-hive by ~220 min (confirmed thermal-mass buffering, not a placement issue); humidity held 46.5–49.6%, tracking the dry apiary ambient; vibration shows 14 of 15 days with daily fanning peaks (baseline ~16.7 mG rising to ~34.1 mG, avg 2.0×) with dominant 80–120 Hz fanning band at −10.2 dB and kurtosis 2.8 (normal, no impulsive events); the 200–260 Hz band carries the strongest per-band daily acoustic rhythm (6.8 dB swing), with the vibration dominant rhythm shifting 5–20 Hz → 160–200 Hz in the second half of the window — worth watching but not alarming; gas heater-scan at 320°C ref 441 kΩ vs. all-time avg 417 kΩ (+6%, within normal range), low-temperature steps (100–200°C) carry the strongest daily rhythm (+24% swing at 100°C), consistent with brood-pheromone and nectar-processing VOC cycling.

  🔬 Correlations & Discoveries

  sound_spectrum vs temperature (14d) | r = -0.43

  The genuine deconfounded coupling between in-hive temperature and gas resistance (r=−0.43, partial r=−0.38 controlling for outdoor temp) reflects peak-season fanning activity: as colony temperature rises toward the upper regulation limit, bees fan more intensively, which circulates and concentrates hive VOCs, driving gas resistance down — a healthy thermoregulatory response, not a stress signal, confirmed by acoustically stable sound energy across the full 14-day window.

  📚 Reference: Ramsey et al. 2020, Seeley & Tautz 2001, Stabentheiner et al. 2010

  vibration_rms vs vibration_kurtosis (14d) | r = +0.51

  The positive VibrationRMS–Kurtosis coupling (r=+0.51) in Iris means that higher-amplitude vibration bursts tend to be impulsive rather than sustained — consistent with discrete fanning activation events rather than broadband colony distress; kurtosis remains at 2.8 (well below the >5.0 impact threshold), so no physical disturbance events are indicated.

  📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000
  ⚠️ Issue: Broad-spectrum acoustic elevation persists above all-time baseline for multiple consecutive reports: 100–150 Hz +7.0 dB, 1500–3600 Hz +6.8 dB, 150–200 Hz +5.1 dB, 800–1500 Hz +4.1 dB — brood and queen verification this week is warranted.

  ⚠️ Issue: Humidity avg 48.3% (low 46.5%) — just below the 50–70% brood-optimal zone; consistent with dry July ambient but worth noting if lows approach 45% on consecutive days.

  ▹ Action: Priority this week: perform a brood-and-queen check on Iris — confirm fresh eggs, solid brood pattern, and queen presence; the persistent multi-band broadband acoustic elevation spanning both low and high frequencies across multiple consecutive reports is the apiary's primary open question and a physical look will resolve it.

  ▹ Action: While inspecting, note whether the colony feels exceptionally populous or defensive — both are consistent with the sustained elevated broadband acoustic energy profile seen in Iris.
• Hive #2 warning Score: 68/100
  📋 Overall Health

  Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 94.8°F (34.9°C) avg (all-time avg 94.6°F / 34.8°C, +0.2°F / +0.1°C, firmly in the ideal 93–97°F / 34–36°C zone) with only 1.6°F (0.9°C) daily oscillation; humidity averaged 50.5% (range 49.3–51.6%), solidly within the 50–70% optimal zone, and vibration at 15.4 mG avg with kurtosis 3.0 (calm, normal). The persistent low-frequency spectral shift continues — 150–200 Hz +7.1 dB, 100–150 Hz +5.7 dB — alongside modest overall acoustic softening (−11.2 dBFS vs. all-time avg −10.1 dBFS, −1.1 dB), now also showing a broadband upward vibration trend in the second half of the day (+2.0 dB across all 6 bands); a brood-and-queen check this week remains warranted.

  🌅 Diurnal Cycle Patterns

  Temperature held in a remarkably tight 94.1–95.7°F (34.5–35.4°C) arc — 1.6°F (0.9°C) peak-to-trough, well within the optimal brood-clamping band — with outdoor leading in-hive by only ~100 min, reflecting very efficient thermal insulation; humidity held 49.3–51.6% with a genuine deconfounded temp–humidity coupling (r=−0.49) reflecting normal psychrometric broodnest regulation; vibration shows 15 of 15 days with daily fanning peaks (baseline ~12.2 mG rising to ~49.8 mG, avg 4.1×, the highest fanning ratio in the apiary), with all 6 vibration bands trending upward in the second half of the day (+~2.0 dB), consistent with intensifying afternoon fanning/heat-management activity; the dominant acoustic rhythm band shifted 100–150 Hz → 150–200 Hz across the window, and the gas heater-scan shows a major step-down since mid-July (320°C ref 137 kΩ vs. all-time avg 333 kΩ, −59%) with the 100–200°C steps also compressed (−50–58%), consistent with sustained elevated VOC load from active honey ripening or brood expansion — temperature and acoustics both remain stable, making colony activity the most likely explanation.

  🔬 Correlations & Discoveries

  temperature vs humidity (14d) | r = -0.49

  The genuine deconfounded temperature–humidity inverse (r=−0.49) in Hive #2 is a textbook broodnest psychrometric signature: as heater bees raise local temperature, the same absolute water content registers as a lower RH%, so the tight 94–96°F core produces the observed mild RH dips — active homeostasis, not a drying hive.

  📚 Reference: Human et al. 2006, Ellis et al. 2008, Eouzan et al. 2019

  gas_resistance vs battery (14d) | r = +0.46

  The positive gas resistance–battery coupling (r=+0.46) likely reflects shared thermal cycling: the sensor heater draws more current during peak-temperature phases, coinciding with periods when the colony's own warmth shifts the MOX baseline, producing a correlated but physically independent co-movement rather than a causal colony–battery relationship.

  📚 Reference: Burgues & Marco 2018, Bosch Sensortec BME688 datasheet
  ⚠️ Issue: Low-frequency acoustic bands remain persistently elevated above all-time baseline: 150–200 Hz +7.1 dB, 100–150 Hz +5.7 dB — with dominant rhythm band shift 100–150 Hz → 150–200 Hz across the window; a brood-and-queen check this week is warranted to confirm population trend.

  ⚠️ Issue: Gas heater-scan 320°C ref at 137 kΩ vs. all-time avg 333 kΩ (−59%); sustained since ~mid-July alongside the acoustic shift — temperature and vibration remain stable, pointing to active colony VOC production (honey ripening, brood pheromones), but worth documenting at inspection.

  ▹ Action: Plan a brood check this week on Hive #2 — confirm fresh eggs and solid brood pattern; the persistent low-frequency spectral shift and modest overall acoustic softening warrant a physical look even though brood temperature, humidity, and vibration remain fully stable.

  ▹ Action: Log the gas heater-scan fingerprint in your inspection notes — now building a multi-week VOC baseline that will be a valuable reference for future comparisons.
• Hive #1 healthy Score: 82/100
  📋 Overall Health

  Your Hive #1 remains acoustically pristine for a tenth consecutive report — all 10 sound bands within ±0.1 dB of their all-time baseline (sound averaging −16.4 dBFS vs. all-time avg −16.4 dBFS, a perfect match), confirming the adult bee population is fully intact and active; temperature averaged 89.3°F (31.9°C) (all-time avg 89.1°F / 31.7°C, +0.2°F / +0.1°C above baseline) with a 3.1°F (1.7°C) daily oscillation, humidity averaged 43.2% — consistent with the dry July apiary ambient (outdoor 35.7% RH), and vibration is stable at 16.6 mG avg with kurtosis 2.9 (normal). Watch for continued brood temperature stability as late July heat continues.

  🌅 Diurnal Cycle Patterns

  Temperature cycles between 87.7–90.8°F (31.0–32.7°C) — a 3.1°F (1.7°C) arc, below the 5.4°F healthy-brood threshold and confirming solid thermal regulation; genuine deconfounded temp–gas resistance coupling is the strongest in the apiary (r=−0.78, partial r=−0.71 controlling for outdoor temp), indicating Hive #1's VOC load is tightly coupled to its own thermal state — consistent with active fanning circulating brood and honey-ripening volatiles as temperature rises; the temp–humidity inverse (r=−0.43) confirms standard psychrometric broodnest regulation; humidity held 42.1–44.0%, low but stable and consistent with dry ambient (no brood-desiccation concern given stability); vibration shows 14 of 15 days with daily fanning peaks (baseline ~15.9 mG rising to ~24.0 mG, 1.5×), with dominant 80–120 Hz fanning band and all 6 vibration bands showing a daily rhythm led by 5–20 Hz (4.0 dB); gas heater-scan 320°C ref at 404 kΩ vs. all-time avg 384 kΩ (+5%, within normal range), with dominant rhythm band shifting 100°C → 150°C across the window — a mild seasonal evolution in the VOC fingerprint, consistent with mid-July brood and foraging activity.

  🔬 Correlations & Discoveries

  temperature vs gas_resistance (14d) | r = -0.78

  Hive #1's strong genuine temp–gas resistance coupling (r=−0.78, the highest in the apiary) reflects thermally-driven VOC volatilization: as in-hive temperature rises, brood pheromones (E-β-ocimene), propolis terpenes, and honey-ripening esters volatilize more readily and concentrate in the hive air, driving MOX resistance down — a direct correlate of active, warm-season colony metabolism, not a stress indicator.

  📚 Reference: Maisonnasse et al. 2010, Burgues & Marco 2018, Seeley 1985
  ▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern in Hive #1 — the perfectly stable acoustics across all 10 bands for ten consecutive reports are strongly reassuring, and confirming brood activity will round out the picture heading into late July.
• Hive #3 healthy Score: 91/100
  📋 Overall Health

  Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 93.8°F (34.3°C) avg (all-time avg 93.4°F / 34.1°C, +0.4°F / +0.2°C above baseline, firmly in the ideal 93–97°F / 34–36°C zone) with an exceptional 1.7°F (0.9°C) daily oscillation, and all 10 sound bands within ±0.2 dB of their all-time baseline (sound averaging −16.4 dBFS vs. all-time avg −16.3 dBFS, a near-perfect match); humidity averaged 52.2% (range 51.6–53.5%), solidly within the optimal 50–70% zone, vibration at 20.4 mG avg with kurtosis 2.7 (ideal normal), and the gas heater-scan step-down since ~July 17 (320°C ref 89 kΩ vs. all-time avg 193 kΩ) continues with stable temperature and acoustics, most consistent with peak July honey-ripening or brood-pheromone activity. Watch for the gradual four-week warming trend (+1.1°F / +0.6°C) as the apiary moves deeper into late July.

  🌅 Diurnal Cycle Patterns

  Temperature held in a tight 92.8–94.5°F (33.8–34.7°C) arc — 1.7°F (0.9°C) peak-to-trough, the tightest clamping in the apiary alongside Hive #2 — with a strong genuine temp–humidity inverse (r=−0.77, the highest in the apiary), confirming active broodnest psychrometric regulation; the partial coupling (r=−0.42 controlling for outdoor temp) confirms this is genuinely colony-driven, not weather-driven; a positive humidity–vibration coupling (r=+0.44) reflects the well-documented fanning-triggers-when-humidity-rises mechanism, with the dominant vibration rhythm shifting 80–120 Hz → 50–80 Hz in the second half of the window — a mild metabolic-baseline shift consistent with colony activity slightly broadening its fanning footprint; vibration shows 15 of 15 days with daily peaks (baseline ~19.7 mG rising to ~35.0 mG, 1.7×); gas heater-scan shows a confirmed change-point step of −136 kΩ around July 17, with 100–200°C low-temperature steps now showing +13–19% band energy increases — the low-temp step rise while high-temp steps hold is consistent with heavier, less-reactive volatiles (honey esters, propolis terpenes) increasing, a VOC fingerprint shift rather than a single-magnitude change; temperature and acoustics are both perfectly stable.

  🔬 Correlations & Discoveries

  temperature vs humidity (14d) | r = -0.77

  Hive #3's strongest genuine correlation — temp–humidity inverse (r=−0.77) — is the apiary's clearest expression of active broodnest hygroregulation: the colony maintains near-constant absolute moisture content in the brood zone, so the tightly clamped 34°C core produces a predictable RH inverse as temperature micro-oscillates; this is evidence of robust thermoregulatory machinery, not sensor noise.

  📚 Reference: Human et al. 2006, Ellis et al. 2010, Eouzan et al. 2019

  humidity vs vibration_rms (14d) | r = +0.44

  The positive humidity–vibration coupling (r=+0.44) in Hive #3 captures the fanning feedback loop: when in-hive humidity rises (e.g. fresh nectar intake or metabolic water), workers increase fanning intensity (raising vibration RMS in the 50–120 Hz bands), which ventilates moisture and lowers humidity — a live telemetry record of the colony's active hygroregulation response described by Ellis et al. 2008.

  📚 Reference: Ellis et al. 2008, Stabentheiner et al. 2010
  ▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern in Hive #3 — the stable 93.8°F (34.3°C) brood temp, perfectly matched acoustics, and optimal 52.2% humidity all indicate a colony at peak July health; no urgent action needed.

  ▹ Action: Note the sustained gas heater-scan step-down since ~July 17 (320°C ref 89 kΩ vs. all-time avg 193 kΩ) in your inspection log — temperature and acoustics are both perfectly stable, making peak-season honey ripening or brood-pheromone activity the most likely explanation; documenting it now builds a useful multi-season VOC baseline for future comparison.