AI Beehive Health Report — 2026-08-30

As of August 30, 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 on or near their individual baselines; Hive #2 remains the single hive to watch, its 18-day acoustic decline now holding steady at −16.6 dBFS versus an all-time average of −10.5 dBFS, while brood temperature stays locked at a textbook 94.9°F (35.0°C) and all other channels remain on-baseline.

Across all four hives, the deseasonalized analytics consistently reveal a genuine in-hive temperature–humidity coupling (r = +0.43 to +0.69) that is independent of outdoor weather — reflecting active hygroregulation tied to brood-zone metabolic heat, exactly as documented by Human et al. 2006 and Ellis et al. 2008; the one apiary outlier is Hive #2, where this coupled system is showing a declining colony-state PCA index, worth keeping an eye on heading into autumn.

Against an outdoor swing of 64.8–90.1°F (18.2–32.3°C) at a very dry 18–50% RH with pressure easing gently higher (+0.36 hPa/3h, clearing), all four hives show clear daily vibration peaks and acoustically stable spectral fingerprints; in-hive humidity across the apiary sits in the 40–48% range, tracking the dry late-summer ambient air in a fully normal ventilation pattern with no condensation risk.

• Iris healthy Score: 80/100
  📋 Overall Health

  Your Iris hive is in good late-summer shape — the 24h average of 89.5°F (31.9°C) sits just 0.6°F (0.3°C) above the all-time average of 88.9°F (31.6°C), well within normal drift, and all 10 acoustic bands are within ±0.4 dB of their historical baseline confirming a fully intact population; humidity averaged 39.8%, consistent with the dry ambient air and this hive's own norm. The gentle four-week cooling arc (90.9→88.9→88.7→87.6°F) continues on track as a normal late-summer brood contraction — on your next routine visit, a quick check for fresh eggs will confirm the seasonal trajectory.

  🌅 Diurnal Cycle Patterns

  Active diurnal temperature cycles averaging ±4.8°F (±2.7°C) daily, with vibration showing a clear daily peak on all 15 of 15 days (baseline ~16.6 mG rising to ~25.0 mG, 1.5× ratio) — a textbook late-summer fanning and foraging rhythm. The 200–260 Hz acoustic daily rhythm is weakening slightly (4.3 dB → 2.3 dB) with a dominant rhythm band shift toward 260–350 Hz, consistent with a gradual seasonal winding-down of peak foraging recruitment; the gas heater-scan dominant rhythm shifted from the 150°C step to the 100°C step, a minor low-temperature VOC pattern change that tracks with the dry, low-humidity ambient air and carries no independent concern. Vibration dominant rhythm shifted 50–80 Hz → 5–20 Hz, consistent with DVAV circadian activity changes as colony prepares for late-summer dearth.

  🔬 Correlations & Discoveries

  gas_resistance vs in_hive_temp (14d) | r = -0.37

  The partial correlation (controlling for outdoor temp) shows gas resistance falling modestly as in-hive temperature rises — consistent with increased fanning and volatile circulation during warmer parts of the daily cycle, a well-documented benign coupling in active late-summer colonies; the 24h gas resistance of 431,976 Ohms sits just 4% below the all-time average of 448,861 Ohms, confirming the hive air environment is stable and unremarkable.

  📚 Reference: Seeley 1985 & 1995, Winston 1987, Stabentheiner et al. 2010
  ▹ 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 94.9°F (35.0°C) with a razor-tight 1.4°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 colony; however, the acoustic decline that began around August 12th has now persisted for 18 days, with the overall level at −16.6 dBFS versus an all-time average of −10.5 dBFS (−6.1 dBFS deviation), and the 100–150 Hz band sitting −13.8 dB below its historical baseline. Humidity averaged 47.1% — healthy and within range — and vibration at 12.8 mG (kurtosis 3.0, peak 85 Hz) remains on its all-time average of 15.0 mG; this remains a single acoustic-channel anomaly to confirm visually at your next routine visit this week.

  🌅 Diurnal Cycle Patterns

  Compressed diurnal temperature range of only 1.4°F (0.8°C) reflects superb brood-nest clamping, the tightest in the apiary; vibration shows a robust daily spike on all 15 of 15 days (baseline ~12.5 mG rising to ~51.0 mG, 4.1× ratio) confirming active daily foraging and fanning cycles. The per-band acoustic analysis shows the 100–150 Hz daily rhythm weakening from 5.6 dB to 2.0 dB and the 150–200 Hz rhythm weakening from 5.0 dB to 1.5 dB — the gradual loss of low-frequency daily rhythmicity is consistent with reduced forager flight activity, likely reflecting late-summer dearth; the gas heater-scan shows a modest 13% reduction at the 100°C step, a minor shift in the low-temperature volatile profile that is within the expected range for late-August honey-ripening and dearth-reduced brood pheromone output.

  🔬 Correlations & Discoveries

  in_hive_temp vs in_hive_humidity (14d) | r = +0.69

  The strong deconfounded temperature–humidity coupling (r = +0.69, p = 6.4e-82) — verified to be colony-specific physiology, not merely a shared diurnal cycle — reflects active brood-zone hygroregulation: as metabolic heating rises, water vapour from brood respiration and evaporative cooling rises proportionally, a well-documented marker of a healthy, brood-active colony maintaining its 50–60% RH setpoint (Human et al. 2006).

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

  sound_level vs sound_spectrum_100_150hz (14d) | r = -13.8

  The 18-day sustained decline in low-frequency acoustic energy (100–150 Hz band −13.8 dB below baseline; overall −6.1 dBFS below average) with simultaneous brood temperature held perfectly on-baseline is the key diagnostic tension in this hive: population loss from a swarm or queen failure would collapse both acoustics AND temperature, but here only the acoustic channel has shifted while thermoregulation is flawless — pointing toward late-summer dearth-driven forager recruitment wind-down or a modest population reduction consistent with normal late-season brood contraction (Seeley 1985) rather than a structural colony event.

  📚 Reference: Ramsey et al. 2020, Seeley & Tautz 2001, Kanelis et al. 2023
  ⚠️ Issue: Sustained 18-day multi-band acoustic decline: overall sound at −16.6 dBFS vs all-time average of −10.5 dBFS; 100–150 Hz band −13.8 dB below baseline, 1500–3600 Hz band −10.7 dB below baseline; brood temperature, vibration timing, humidity, and gas all remain on-baseline — single acoustic-channel anomaly persisting 18+ days, 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: 70/100
  📋 Overall Health

  Your Hive #1 continues its gradual but acoustically-confirmed-benign cooling drift — the 24h average of 85.0°F (29.5°C) is 0.5°F (0.2°C) below the all-time average of 85.5°F (29.7°C), continuing the steady 14-day cooling trend (87.6→86.2→84.7→83.1°F weekly); crucially, all 10 acoustic bands are 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. Humidity averaged 39.5% and vibration at 16.2 mG (kurtosis 3.2, peak 116 Hz) sits right on its all-time average of 16.4 mG, both normal; 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 Patterns

  Active diurnal temperature cycles averaging ±6.5°F (±3.6°C) — the widest swing in the apiary — consistent with a colony under modest late-summer heat load with a slightly reduced brood mass to buffer the thermal core; vibration shows a daily peak on 14 of 15 days (baseline ~15.8 mG rising to ~22.8 mG, 1.4× ratio) confirming an active foraging schedule. No strong per-band daily acoustic rhythm is detectable (max 0.6 dB in 150–200 Hz), which is normal for a late-summer colony with a stable, low-variance acoustic fingerprint; the gas heater-scan shows a robust 10/10 bands with daily rhythm and a dominant shift from the 200°C step to the 150°C step, with the 200°C rhythm weakening — consistent with gradual drying of hive aromatics as honey ripening matures and late-summer dearth reduces fresh nectar intake.

  🔬 Correlations & Discoveries

  gas_resistance vs in_hive_temp (14d) | r = -0.83

  The strong partial correlation between gas resistance and in-hive temperature (r = −0.83, controlling for outdoor temp) is the strongest hive-specific gas–temperature coupling in the apiary, and reflects a well-documented benign mechanism: as temperature rises during active foraging periods, fanning intensifies and circulates more hive volatiles past the sensor, transiently reducing gas resistance — the current 24h gas resistance of 517,433 Ohms sits just 3.8% above the all-time average of 498,284 Ohms, confirming no sustained VOC anomaly.

  📚 Reference: Seeley 1985 & 1995, Winston 1987, Stalidzans et al. 2017
  ⚠️ Issue: Gradual 14-day cooling drift: 24h average 85.0°F (29.5°C) continuing a 4.5°F (2.5°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: 77/100
  📋 Overall Health

  Your Hive #3 continues its excellent run — the 24h average of 92.4°F (33.6°C) sits just 0.4°F (0.2°C) below the all-time average of 92.8°F (33.8°C), well within the ideal brood band and continuing a gentle, entirely normal seasonal tail-off (93.6→93.2→92.5→91.9°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 46.0% and vibration at 20.4 mG (kurtosis 2.7, peak 72 Hz) right on its all-time norms. The battery touched a new all-time low of 3,982 mV within the last 24 hours (currently 4,016 mV) — worth monitoring passively as solar input decreases heading into autumn.

  🌅 Diurnal Cycle Patterns

  Active diurnal temperature cycles averaging ±2.8°F (±1.6°C) with a tight brood-zone hold, vibration daily peaks on all 15 of 15 days (baseline ~19.4 mG rising to ~34.8 mG, 1.8× ratio) — a healthy, consistent late-summer activity rhythm; the dominant vibration rhythm lives in the 5–20 Hz band across all six vibration channels, consistent with DVAV circadian signalling. No strong per-band daily acoustic rhythm is present (max 0.7 dB), reflecting a very stable colony acoustic fingerprint; the gas heater-scan shows no strong daily rhythm (max 9% swing at 320°C step), consistent with a hive whose honey-ripening and foraging VOC profile has settled into a low-variance late-summer steady state.

  🔬 Correlations & Discoveries

  in_hive_temp vs gas_resistance (14d) | r = +0.49

  The deconfounded temperature–gas resistance coupling (r = +0.49) in Hive #3 reflects the metabolic ventilation cycle: warmer brood periods drive fanning which circulates hive volatiles (brood pheromones, honey aromatics, propolis terpenes) past the sensor and lowers resistance, then cools again — a normal, healthy coupling confirmed as colony-specific physiology by the partial correlation analysis, and fully consistent with Hive #3's stable 24h gas resistance of 89,982 Ohms sitting within 3% of its all-time average of 92,745 Ohms.

  📚 Reference: Human et al. 2006, Maisonnasse et al. 2010, Seeley 1974
  ▹ Action: Monitor Hive #3's battery passively — it touched a new all-time low of 3,982 mV within the last 24 hours (currently 4,016 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 late-summer harvest timing.