Within Insects
Why Bugs Can Look Impossibly Fast
A tiny insect close to a camera can look like a distant craft making impossible moves when its range is only assumed.
On this page
- Why single cameras cannot measure range
- How close motion inflates speed estimates
- Simple checks before calling it anomalous
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Introduction
A common mistake in UFO video analysis is to assume that an object seen crossing the frame is far away. If that assumption is wrong, a tiny insect only centimetres from the lens can be transformed into an apparently distant object travelling at extraordinary speed. The video itself often contains no direct distance information, yet viewers instinctively assign the object a location somewhere in the sky. Once that happens, ordinary insect motion can be converted into calculations suggesting impossible acceleration, hypersonic velocity or abrupt changes of direction. This is one of the simplest ways that genuine objects become apparent UFOs. The effect is not caused by unusual flight behaviour but by a range-estimation error: the object’s distance is guessed rather than measured. [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me…
Why Single Cameras Cannot Measure Range
A standard video camera records where an object appears in the image, not how far away it is. A small nearby object and a large distant object can occupy the same number of pixels on the screen. Without independent distance information, the camera cannot automatically distinguish between the two possibilities. This limitation is well known in computer vision and is one reason why accurate distance measurement from a single image is a difficult technical problem requiring extra assumptions, calibration or multiple viewpoints. [PMC]pmc.ncbi.nlm.nih.govPMCObject Distance Estimation Using a Single Image Taken from…by N Kim · 2020 · Cited by 20 — This paper proposes a technique to estim… 2arXiv
For UFO footage, the problem is particularly severe when the object appears as a dot, blur or streak against an empty sky. There may be no landmarks, shadows, radar data or stereo views available to establish range. In such cases, assigning a distance becomes an interpretation rather than a measurement.
NASA’s independent UAP study highlighted the broader issue by noting that analysis is frequently limited by poor sensor calibration, missing metadata and a lack of multiple measurements. Without those supporting data, apparent performance characteristics can be unreliable. [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me… [NASA]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me…
The “Small and Close” Versus “Large and Far” Problem
Imagine an insect 10 centimetres from a camera lens. It moves 20 centimetres sideways in half a second. To the camera, that motion can produce a large sweep across the frame.
Now imagine a viewer assumes the object is 500 metres away. The same angular movement would imply that the object covered tens or hundreds of metres in the same time interval. The calculated speed suddenly becomes extraordinary even though the actual motion was that of a common fly.
The image does not tell the viewer which interpretation is correct. Additional evidence is needed to choose between them. Until that evidence exists, speed estimates based solely on the assumed distance are speculative. [PMC]pmc.ncbi.nlm.nih.govPMCObject Distance Estimation Using a Single Image Taken from…by N Kim · 2020 · Cited by 20 — This paper proposes a technique to estim… 2arXiv
How Close Motion Inflates Speed Estimates
The key mechanism is angular motion. Cameras record angles rather than true distances. When a nearby object crosses the field of view, its angular position can change very rapidly.
A useful everyday comparison is looking out of a moving train. Fence posts close to the track appear to race past, while distant hills seem almost stationary. The nearby objects are not actually moving faster than the hills; their apparent speed is greater because of geometry.
Near-lens insects exploit the same principle. A fly moving a few centimetres near the camera can generate a dramatic angular shift. If that angular shift is interpreted as motion occurring hundreds or thousands of metres away, the inferred speed can become enormous.
This is why some UFO videos appear to show objects:
- Shooting across the frame in a fraction of a second.
- Instantly changing direction.
- Accelerating beyond known aircraft capabilities.
- Appearing and disappearing with impossible timing.
The apparent performance depends heavily on the assumed range. Change the distance estimate and the calculated speed can collapse from extraordinary to ordinary. Slate [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me…
Why the Error Can Be Huge
Distance errors do not merely introduce small inaccuracies. They can alter conclusions by orders of magnitude.
If an object is assumed to be 1,000 times farther away than it really is, its inferred size and travelled distance may also be inflated by roughly the same factor. A movement of centimetres can become interpreted as movement of tens or hundreds of metres. Because speed is distance divided by time, the speed estimate grows accordingly.
This is one reason why extraordinary performance claims based on a single ambiguous video should be treated cautiously. The uncertainty is often dominated by the unknown distance rather than by the quality of the timing measurements. [PMC]pmc.ncbi.nlm.nih.govPMCObject Distance Estimation Using a Single Image Taken from…by N Kim · 2020 · Cited by 20 — This paper proposes a technique to estim…
A Useful Example: The Denver “UFO” Videos
One of the best-known examples involved videos from Denver that were promoted as showing fast-moving unidentified objects. The objects appeared to dart across the frame at remarkable speed and were difficult to identify visually.
Astronomer Phil Plait analysed the footage and argued that the behaviour was consistent with insects passing close to the camera rather than distant aerial craft. The apparent mystery depended on treating the objects as far away. Once the near-camera explanation was considered, the observed motion no longer required unusual performance. [Slate]slate.comUFOs over Denver are insectsSlateUFOs over Denver are insectsNovember 28, 2012 — 28 Nov 2012 — As a skeptic and an astronomer, I'm sometimes asked what it would take…
The case illustrates a recurring pattern in UFO video analysis:
- An object appears unusually fast.
- The object’s distance is assumed rather than measured.
- Large speeds are calculated from that assumption.
- A near-camera explanation removes the need for extraordinary motion.
The crucial step is not the speed calculation itself but the range estimate that precedes it.
Simple Checks Before Calling It Anomalous
When a video appears to show impossible velocity, several questions can help determine whether a nearby insect is a plausible explanation.
Has the distance been measured?
If there is no independent range measurement, any speed estimate is provisional.
Is there only one camera?
A second viewpoint can often reveal whether the object is nearby or distant. A single camera usually cannot do this reliably on its own. [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me…
Does the object pass in front of or behind known features?
Interaction with clouds, buildings or terrain can help constrain distance. Objects floating against an empty sky provide fewer clues.
Is the object out of focus?
A blurred shape may indicate something passing close to a lens focused on distant scenery.
Does the motion resemble angular sweep rather than sustained flight?
Many near-lens insects cross the frame rapidly without showing the consistent trajectory expected of a distant aircraft.
Are extreme speeds based entirely on assumed altitude or range?
If so, the conclusion may be driven more by geometry than by observed behaviour.
What This Mechanism Explains
The “fast bug” explanation does not require camera malfunction, hoaxes or mistaken timing. It relies on a simpler issue: humans naturally infer distance from a flat image even when the image contains insufficient information to support that inference.
Once a nearby insect is mentally relocated to the distant sky, every subsequent estimate becomes distorted. Its size grows, its speed increases and its ordinary flight path can begin to resemble extraordinary manoeuvres. In many UFO videos, the apparent anomaly is therefore not the object’s motion itself but the hidden assumption about where the object was located when the video was recorded. Slate [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me…
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Endnotes
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Source: science.nasa.gov
Link: https://science.nasa.gov/wp-content/uploads/2023/09/uap-independent-study-team-final-report.pdfSource snippet
NASA ScienceIndependent Study Team ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the lack of multiple me...
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Source: nasa.gov
Title: update nasa shares uap independent study report names director
Link: https://www.nasa.gov/news-release/update-nasa-shares-uap-independent-study-report-names-director/Source snippet
UPDATE: NASA Shares UAP Independent Study Report14 Sept 2023 — We found that NASA can help the whole-of-government UAP effort through sys...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC7412466/Source snippet
PMCObject Distance Estimation Using a Single Image Taken from...by N Kim · 2020 · Cited by 20 — This paper proposes a technique to estim...
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Source: arxiv.org
Link: https://arxiv.org/abs/2210.12596 -
Source: arxiv.org
Link: https://arxiv.org/abs/2208.05319 -
Source: slate.com
Title: UFOs over Denver are insects
Link: https://www.slate.com/blogs/bad_astronomy/2012/11/28/ufos_over_denver_are_insects.htmlSource snippet
SlateUFOs over Denver are insectsNovember 28, 2012 — 28 Nov 2012 — As a skeptic and an astronomer, I'm sometimes asked what it would take...
Published: November 28, 2012
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Source: arxiv.org
Link: https://arxiv.org/abs/1702.06441 -
Source: science.nasa.gov
Link: https://science.nasa.gov/uap/Source snippet
nasa.govUAP9 Jun 2022 — The study will focus on identifying available data, how best to collect future data, and how NASA can use that da...
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Source: slate.com
Title: webcam ufo night apparation isn t quite what it s claimed to be
Link: https://www.slate.com/blogs/bad_astronomy/2014/04/10/webcam_ufo_night_apparation_isn_t_quite_what_it_s_claimed_to_be.htmlSource snippet
Bambi Versus the Space Alien10 Apr 2014 — A Mississippi couple talking about some footage from a camera they set up outside their house...
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Source: arxiv.org
Link: https://arxiv.org/html/2506.00125v1Source snippet
1 Introduction30 May 2025 —... (UAP) is limited by poor data quality and incomplete data sets. Existing data are often fragmented, uncal...
Published: May 2025
Additional References
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Source: scientificamerican.com
Link: https://www.scientificamerican.com/article/insects-destructive-to-photographs/Source snippet
Insects Destructive to PhotographsThis article was published with the title “Insects Destructive to Photographs” in SA Supplements Vol. 5...
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Source: primitiveproton.com
Link: https://primitiveproton.com/unidentified-anomalous-phenomena-uap/ -
Source: fastcompany.com
Title: nasa just threw cold water on the idea that ufo sightings are extraterrestrial
Link: https://www.fastcompany.com/90954823/nasa-just-threw-cold-water-on-the-idea-that-ufo-sightings-are-extraterrestrialSource snippet
NASA just threw cold water on the idea that UFO sightings...19 Sept 2023 — Analysis of this data is “hampered by poor sensor calibration...
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Source: youtube.com
Link: https://www.youtube.com/watch?v=TQcqOW39kskSource snippet
Unidentified Anomalous Phenomena Independent Study ReportNASA commissioned an independent study team to examine unidentified anomalous ph...
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Source: fallscityne.biblionix.com
Link: https://fallscityne.biblionix.com/catalog/titles/Source snippet
owned by Falls City Library and Arts Center - BiblionixSo, you wanna be a comic book artist written by Philip Amara; illustrated by Pop...
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Source: meritalk.com
Title: nasa urged to take more permanent role in uap research effort
Link: https://www.meritalk.com/articles/nasa-urged-to-take-more-permanent-role-in-uap-research-effort/Source snippet
NASA Urged to Take More Permanent Role in UAP...15 Sept 2023 — The study team found that most UAP data is “hampered by poor sensor calib...
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Source: nevadacurrent.com
Title: nasa report finds no evidence that ufos are extraterrestrial
Link: https://nevadacurrent.com/2023/09/18/nasa-report-finds-no-evidence-that-ufos-are-extraterrestrial/Source snippet
18 Sept 2023 — Analysis of this data is “hampered by poor sensor calibration, the lack of multiple measurements, the lack of sensor metad...
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Source: thedebrief.org
Title: nasas unidentified anomalous phenomena report key takeaways
Link: https://thedebrief.org/nasas-unidentified-anomalous-phenomena-report-key-takeaways/Source snippet
NASA's Unidentified Anomalous Phenomena Report14 Sept 2023 — “At present, analysis of UAP data is hampered by poor sensor calibration, th...
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Source: scispace.com
Link: https://scispace.com/pdf/object-distance-measurement-using-a-single-camera-for-3dljjvt2n9.pdfSource snippet
based systems in order to develop an accurate, fast, and efficient algorithm to.Read more...
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Source: avweb.com
Title: nasa report no aliens but more uap investigations needed
Link: https://avweb.com/aviation-news/nasa-report-no-aliens-but-more-uap-investigations-needed/Source snippet
NASA Report: No Aliens, But More UAP Investigations...15 Sept 2023 — The report said investigations have thus far “been hampered by poor...
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