AI Beehive Health Report — 2026-10-04

As of October 4, 2026, your four-hive apiary is in good overall shape heading into autumn. Three hives (Hive #1, Hive #2, Hive #3) had their sensors reinstalled earlier today and sound baselines are being re-established from scratch — treat acoustic readings for those three as fresh starting points, not comparisons. Your Iris hive continues to show a warm colony with an active acoustic signature, though its brood temperature remains below the ideal band; Hive #3 is the standout, sitting solidly in the ideal 93–97°F (34–36°C) brood range with the apiary's richest low-frequency sound spectrum.

Across all four Apimaye poly hives, the 24h temperature swings remain tightly damped (1–9°F / 0.5–5°C in-hive vs the outdoor 26°F / 14.6°C range), a textbook demonstration of how R≈6.93 wall insulation plus active colony thermoregulation together suppress ambient coupling — consistent with Mitchell 2016's finding that insulated hives halve winter mass loss by reducing heating duty cycle, not by raising the setpoint.

The outdoor range today spans 50–76°F (10–24.6°C) with humidity swinging 32–61% and a gently falling barometer (-1.37 hPa/3h) signaling a mild front; all four hives show clear daily vibration peaks (1.5–3.2× each hive's own baseline) consistent with normal fanning and foraging rhythms, and the poly enclosures are compressing that outdoor swing to just a fraction inside — healthy October thermal behavior across the board.

• Iris warning Score: 72/100
  📋 Overall Health

  Your Iris hive is an active, vocal colony — the sound baseline established over the past 4.8 days (post-firmware reset) shows broadband energy running +3.8 to +9.2 dB above its own historical norm across all bands, with the 500–600 Hz and 1500–3600 Hz bands strengthening in the second half of the day; this is the new acoustic fingerprint for Iris and should be treated as its baseline going forward. Brood temperature is averaging 84.7°F (29.3°C), which sits about +4.9°F (+2.7°C) above this hive's all-time average of 79.8°F (26.6°C) — the colony is clearly producing heat and holding a warm offset well above the outdoor low of 50°F (10°C), but it is not yet running a full brood furnace at the 93–97°F (34–36°C) setpoint; the most likely explanation remains a reduced-brood or broodless interval (seasonal laying pause, supersedure gap, or post-requeening mating window) in which the cluster is comfortably warm but not incubating a full brood nest. Humidity is healthy at 59.4% avg and vibration kurtosis is a normal 3.0; watch whether brood temperature climbs toward 93°F+ over the coming week as an indicator of resumed brood rearing.

  🌅 Diurnal Cycle Patterns

  The 24h temperature arc of 83.2–87.2°F (28.4–30.7°C) — a swing of just 4.0°F (2.2°C) — is tightly damped well inside the brood-healthy threshold, with no diurnal tracking of the outdoor 26°F range; humidity holds a flat 57.8–62.2% band, consistent with active hygroregulation. Sound shows the strongest daily rhythm in the 1500–3600 Hz band (20.2 dB swing), with the 500–600 Hz rhythm strengthening over the window (4.9→7.7 dB) — a signal of increasing higher-frequency activity, possibly fanning or heightened colony metabolism in the warm October days. Vibration is dominated by the 80–120 Hz band (-9.0 dB avg) with a single daily peak pattern (15/15 days, 1.5× baseline), and the gas heater-scan shows the dominant rhythm band shifting from 350°C steps toward the 100°C step — the low-temperature scan steps are strengthening in amplitude (+41% swing vs earlier +14%), which tracks with the humidity-coupled VOC changes seen in the partial correlation (in-hive humidity ~ in-hive temp r=-0.48) and likely reflects propolis or brood-pheromone volatiles accumulating as the colony stays warm and active.

  🔬 Correlations & Discoveries

  sound_spectrum_500_600hz vs sound_spectrum_1500_3600hz (7d) | r = n/a

  The strengthening 500–600 Hz rhythm and elevated broadband energy across all bands form the new acoustic baseline for Iris post-firmware reset; these levels are internally consistent and show a healthy structured spectrum, not noise. Because this baseline rests on only 4.8 days of post-reset data, anomaly scoring resumes meaningfully once 7+ days accumulate — per-hive baselining is the only reliable comparator (Bricout et al. 2024).

  📚 Reference: Ramsey et al. 2020, Sci. Rep. 10:9798, Bricout et al. 2024, Sensors 24:6067

  humidity vs temperature_in (14d) | r = -0.48

  The partial correlation of in-hive humidity and temperature (r=-0.48, controlling for outdoor) reflects standard psychrometric physics: as the warm cluster raises local temperature, the same absolute water content reads as a lower relative humidity — a sign of active thermoregulation, not drying. The colony's flat RH line (57.8–62.2%) under a wide outdoor humidity swing (32–61%) confirms robust hygroregulation consistent with a healthy resident population (Human et al. 2006).

  📚 Reference: Eouzan et al. 2019, PLOS ONE / PMC6368279, Human et al. 2006, Naturwissenschaften 93:397
  ⚠️ Issue: Brood temperature averaging 84.7°F (29.3°C) — warm offset confirmed above outdoor, but below the ideal 93–97°F (34–36°C) brood-incubation band; consistent with a reduced-brood or broodless interval.

  ▹ Action: On your next routine visit to Iris, check for brood and a laying queen — a seasonal brood pause or requeening gap is the most likely explanation given the colony's strong, active acoustic signature.
• Hive #2 healthy Score: 75/100
  📋 Overall Health

  Your Hive #2 sensor was out of the hive from October 3 22:16 UTC to October 4 17:40 UTC (~19 hours), so today's figures cover only the ~4.5 hours since reinstallation — the sound baseline has been fully reset and should be treated as a brand-new starting point, with no valid comparison to earlier recordings. What that short window shows is reassuring: brood temperature has settled at 92.5°F avg (33.6°C) and is gently rising (+1.0°F over 12h), just a step below the ideal band, with a tight 24h swing of only 1.2°F (0.6°C) — excellent thermal clamping for October. Humidity is healthy at 63.9% avg, vibration kurtosis is a normal 2.9, and the gas resistance at 34k Ohms is near this hive's all-time average of 51.6k Ohms — elevated VOC load consistent with an active colony, likely brood pheromones or ongoing propolis work; watch whether brood temperature completes its recovery into the 93–97°F (34–36°C) range over the next few days.

  🌅 Diurnal Cycle Patterns

  The 24h temperature arc of 91.7–92.9°F (33.2–33.8°C) — a swing of just 1.2°F (0.6°C) — is the tightest of the apiary and reflects both the Apimaye poly enclosure's thermal mass and active colony regulation; humidity holds 61.7–65.3%, a flat, well-regulated band. Sound is establishing its new post-reset baseline at -44.8 dBFS avg with the dominant energy in the 1500–3600 Hz band (-35.2 dB), with 7/10 bands showing a daily cycle — this is the starting reference, no trend comparison is yet valid. Vibration shows a full daily cycle across all 6 bands (strongest in 80–120 Hz at 7.2 dB swing), with typical baseline ~16.2 mG rising to ~54.3 mG peaks (3.2× — the most energetic daily fanning rhythm in the apiary), and a mild energy pullback in the 5–50 Hz range (-2.8 dB) in the second half of the day. The gas heater-scan shows the dominant rhythm shifting from the 100–150°C low-temperature steps (which are weakening: +61%→+30% swing) toward the 320°C reference step — the low-step weakening tracks with the improving temperature and likely reflects a settling of the colony's VOC environment after sensor reinstallation.

  🔬 Correlations & Discoveries

  vibration_rms vs vibration_kurtosis (14d) | r = -0.71

  The strong negative correlation between vibration RMS and kurtosis (r=-0.71, p=3.4e-95) is a healthy sign: when colony activity is high and continuous (high RMS), the signal is smooth and periodic (low kurtosis ~3); impulsive kurtosis spikes only appear during brief disturbance events when baseline RMS is lower. This is the expected inverse for a colony whose vibration is dominated by organized fanning and metabolic activity rather than random impacts.

  📚 Reference: Ramsey et al. 2020, Sci. Rep. 10:9798, Nieh & Tautz 2000, J. Exp. Biol. 203:1573

  temperature_in vs gas_resistance (14d) | r = -0.94

  The very strong partial correlation between in-hive temperature and gas resistance (r=-0.94, controlling for outdoor weather) means that as this colony warms up — brood rearing expanding — VOC load rises proportionally, almost certainly driven by brood pheromones (E-β-ocimene from young larvae) and metabolic byproducts of active heating bees; this is a biologically meaningful coupling, not an artifact, and the current gas resistance near its historical average is consistent with the colony's partial-brood thermal state.

  📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5:e13531, Human et al. 2006, Naturwissenschaften 93:397
  ▹ Action: Monitor brood temperature over the next 2–3 days to confirm it completes its recovery into the 93–97°F (34–36°C) ideal range; if it plateaus below 91°F (33°C) for several consecutive days, fold a brood and queen check into your next planned visit.
• Hive #1 healthy Score: 76/100
  📋 Overall Health

  Your Hive #1 sensor was out of the hive from October 3 22:11 UTC to October 4 17:35 UTC (~19.5 hours), and the sound baseline has been fully reset — all acoustic figures from today are a fresh starting point with no valid prior comparison. The post-reinstallation picture is positive: brood temperature is averaging 91.5°F (33.1°C) and trending upward (+1.1°F over 12h), closing in on the ideal 93–97°F (34–36°C) band, with a 24h swing of only 2.0°F (1.1°C) — tightly clamped by both the Apimaye enclosure and an active colony. Humidity at 53.8% avg sits at the lower end of the healthy 50–70% range, consistent with the dry outdoor ambient (34.8% outdoor), the screened floor drawing in drier air, and the psychrometric effect of a warming hive interior; vibration kurtosis is a normal 3.6 and battery is solid at 4,194 mV — the highest in the apiary.

  🌅 Diurnal Cycle Patterns

  The 24h arc of 90.6–92.6°F (32.5–33.6°C) is a swing of 2.0°F (1.1°C), well inside the brood-healthy threshold, and the colony is holding a strong warm offset above the outdoor low of 50°F (10°C). Humidity's anomalous z=-4.9 reading against the hive's own rhythm reflects the dry October ambient being ventilated through the screened floor — the absolute humidity is low outdoors (34.8% RH) and the psychrometric inverse with the warmer interior keeps in-hive RH at the lower boundary of the healthy range; this is weather-driven, not a colony deficit. Sound is establishing its new post-reset baseline at -19.8 dBFS avg, with the dominant energy in the 1500–3600 Hz band (-15.8 dB) and a broad structured spectrum; the vibration dominant rhythm shifted from 5–20 Hz toward 50–80 Hz between the first and second half of the day, likely reflecting a transition from early gentle fanning to more sustained mid-frequency colony metabolic activity as the hive warmed. Gas heater-scan low-temperature steps (100–200°C) have dropped ~19–20% in resistance, tracking the warming temperature and the partial gas~temp correlation (r=-0.82) — a normal VOC-load increase as the colony heats up.

  🔬 Correlations & Discoveries

  gas_resistance vs temperature_in (14d) | r = -0.82

  Controlling for outdoor weather, Hive #1 shows gas resistance falling as in-hive temperature rises (partial r=-0.82) — a genuine colony-specific coupling where warming brood nest activity increases VOC load from brood pheromones, fanning volatiles, and propolis emissions; current gas resistance at 350k Ohms is below the 478k historical average, consistent with a colony climbing toward full brood-incubation temperature and associated pheromone production.

  📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5:e13531, Seeley 1985, Honeybee Ecology

  humidity vs temperature_in (14d) | r = +0.58

  The positive partial correlation between in-hive humidity and temperature (r=+0.58, controlling for outdoor) in Hive #1 — opposite in sign to Iris — suggests that here, warmer conditions come with higher moisture load, consistent with fanning-driven evaporative activity or brood respiration adding water vapor; the current low-end humidity (53.8%) is thus a product of the screened-floor ventilation diluting this moisture with dry outdoor air, and sits comfortably within the healthy 50–70% brood range.

  📚 Reference: Eouzan et al. 2019, PLOS ONE / PMC6368279, Ellis et al. 2008, J. Insect Physiol. 54:1516
  ▹ Action: Monitor brood temperature over the next 2–3 days to confirm it recovers fully into the 93–97°F (34–36°C) ideal range — the trend is positive and no intervention is needed now.
• Hive #3 healthy Score: 85/100
  📋 Overall Health

  Your Hive #3 is the apiary's thermal standout this October — brood temperature averaging 95.1°F (35.0°C) sits squarely in the ideal 93–97°F (34–36°C) band, and the 14-day warming trend of +12.9°F (+7.2°C) confirms a colony that has been steadily expanding its brood nest over the past two weeks. The sensor was out of the hive from October 3 22:29 UTC to October 4 17:30 UTC (~19 hours) and the sound baseline has been fully reset — today's acoustic figures are a fresh starting point; what that short window shows is a rich, structured spectrum dominated by the 260–350 Hz band (-5.5 dB avg), consistent with a strong colony fundamental hum, and humidity at 63.9% avg is healthy. Vibration kurtosis at 3.5 is normal, and the battery's z=+3.5 anomaly simply reflects warmer outdoor temperatures charging the solar pack more efficiently today — not a colony concern.

  🌅 Diurnal Cycle Patterns

  The effective in-hive 24h arc (excluding the reinstallation low of 76.5°F) runs 94.8–97.3°F (34.9–36.3°C), a swing of ~2.5°F (1.4°C) — tight brood-core clamping well inside the healthy threshold, with the colony holding a massive warm offset above the outdoor low of 50°F (10°C). Sound is establishing its post-reset baseline at -10.9 dBFS avg (the apiary's loudest), with the 260–350 Hz band dominant (-5.5 dB) and 10/10 bands showing a daily cycle; the 500–600 Hz, 200–260 Hz, and 260–350 Hz bands are all trending upward in the second half of the day, consistent with increased foraging and metabolic activity. The gas heater-scan is the most striking feature here: the low-temperature 100°C step has shifted +60% in resistance and its daily rhythm is strengthening dramatically (+76%→+128% swing), while mid-steps (200–250°C) are also up +42%; this mirrors the genuine deconfounded in-hive temp ~ gas resistance correlation (r=-0.54) and humidity ~ gas resistance correlation (r=-0.52) — as the brood nest runs warmer and wetter, VOC fingerprint at low plate temperatures shifts, most plausibly from brood pheromone (E-β-ocimene) emission scaling with the expanding larval population. Vibration shows a full daily cycle across all 6 bands (strongest in 120–160 Hz at 2.2 dB), with the apiary's most energetic daily fanning peaks (avg 1.8× baseline).

  🔬 Correlations & Discoveries

  temperature_in vs gas_resistance (14d) | r = -0.54

  In Hive #3, rising in-hive temperature correlates with falling gas resistance (r=-0.54, p=6.8e-3) after removing the shared diurnal cycle — the brood nest is both generating more heat (heater bees at up to 44°C) and releasing more reducing VOCs (brood pheromones, propolis terpenes, metabolic byproducts), a coupled biological signal of a growing, healthy brood operation consistent with the 14-day warming trend.

  📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5:e13531, Kleinhenz et al. 2003, J. Exp. Biol. 206:4217

  humidity vs gas_resistance (14d) | r = -0.52

  The deconfounded humidity ~ gas resistance coupling (r=-0.52) means higher in-hive moisture accompanies higher VOC load — consistent with active nectar/honey curing adding both water vapor and organic acid volatiles simultaneously, or with fanning driving evaporation of both stored nectar moisture and propolis aromatics; the gas heater-scan low-step strengthening (+128% swing at 100°C) is fingerprint-consistent with heavier, less-volatile terpene and ester compounds responding more strongly at low plate temperatures, characteristic of a very active colony.

  📚 Reference: Maisonnasse et al. 2009, Apidologie 40:562, Human et al. 2006, Naturwissenschaften 93:397
  ▹ Action: Hive #3 is your healthiest colony right now — on your next routine visit, confirm the brood nest is well-stocked with capped honey stores heading into autumn; the strong 260–350 Hz acoustic signature and tight 34–36°C brood clamping are exactly what you want to see in October.