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Grey wolf vision: the science and the numbers

Canis lupus · order Carnivora · Mammals: all the numbers

Wolves have 2 colour receptor classes (430 and 555 nm): mainly blues and yellows; reds and greens look alike.[1] Their sharpest vision resolves 14.57 cycles per degree, against 63.75 for people in this dataset.[6] Both eyes see the same 97° in front of them.[8] Wolves stop seeing flicker at 84 Hz, against 60 Hz for people.[23]

See it on your photoBack to How do wolves see?
  • 2colour receptor classesMeasured*
  • 14.57cycles per degree (sharpness)Measured
  • 97°seen by both eyesMeasured
  • 84hertz flicker fusion (motion)Measured

The grey wolf (Canis lupus) is a mammal in the order Carnivora. Its eyes belong to the vision type Day dichromat mammal: two cone types (blue and yellow, so reds and greens merge), moderate sharpness and a horizontal band of sharp vision. Measured in this species: colour, sharpness, field of view, foveas, night vision and motion (flicker fusion). Measured core: measured values on at least 3 of the 6 dials.

This is a simulation built from published eye measurements, not what the animal experiences.

Method: How we know what animals see (the See Like Animals vision engine) · Sources · Last updated . Every value below carries its evidence level and sources; nothing is typed by hand.

What wolves see: colour receptors

Grey wolf colour receptor peaks, 300 to 700 nmGrey wolf: 2 receptor peaks at 430, 555 nm; you: 3 at 421.5, 532, 558.4 nm. ultraviolet300400500600700
Grey wolf: 430, 555 nmPeople: 421.5, 532, 558.4 nmWavelength in nanometres

What stands out

  • It has two colour receptor classes (a dichromat): reds and greens fall on one axis, as in red-green colour blindness in people.
  • Its sharpest vision resolves 14.57 cycles per degree: the finest stripe pattern it can tell apart from grey.
  • Both eyes see the same 97° in front of it (binocular overlap), where depth is judged best.
  • It stops seeing flicker at 84 Hz, against 60 Hz for people in this dataset, so fast motion looks about 1.4 times slower to it.[24][25]
  • Activity pattern: nocturnal.

The six dials

Evidence levels: how the tiers work. "Measured" means a value measured in this species; "Estimated" values come from a close relative or an eye-size formula. The last column gives the values for people from the same catalogue.

Vision values for the grey wolf (Canis lupus), catalogue-v1
DialValueEvidenceSourcesPeople
ColourColour receptors
2 receptor classes: 430 nm (VS/SWS (violet)), 555 nm (LWS (long))
species-v1.csv value measured in this species (not in tidy tables)
Measured (not re-verified)[1]Colour receptors: 3 receptor classes: 421.5 nm (VS/SWS (violet)), 532 nm (MWS (green)), 558.4 nm (LWS (long)) Measured (not re-verified)[2][3][4][5]
SharpnessAcuity
14.57 cycles per degree
median of 1 anatomical-ganglion rows (method priority rule)
Measured[6]Acuity: 63.75 cycles per degree Measured[7][6]
Field of viewBinocular overlap
97°
median of 1 rows (eyes-at-rest rows preferred)
Measured[8]Binocular overlap: 122.5° Measured[8][9]
Total field of view: 200° Measured (not re-verified)[10]
Blind area behind the head: 160° Derived[10]
Eye placement: frontal Derived[8][9]
Total field of view
250°
median species-v1 total field of family Canidae: Canis familiaris
Estimated[11]
Sharp zones (foveas)Number of foveas
0
fovea_present / area_centralis_type (retinal topography; count 1 = fovea present, 0 = none)
Measured[12]Number of foveas: 1 Measured[12]
Fovea type: fovea Measured[12]
Fovea type
area centralis, horizontal streak		Measured[12]
Night visionActivity pattern
nocturnal
mode of 9 rows (of 10 rows): arrhythmic/cathemeral; cathemeral; mesopic; mixed (nocturnal/crepuscular, cathemeral, crepuscular or diurnal/crepuscular); nocturnal; nocturnal/crepuscular; scotopic
Measured (not re-verified)[13][14][15][16][17][18][19][20]Activity pattern: diurnal Measured (not re-verified)[13][15][16][2][17][18][19][20]
Pupil shape: vertical Group default[14][21]
Reflective layer (tapetum): no Measured[22]
Rods vs cones: cone-dominated Derived[13][15][16][2][17][18][19][20]
Rods vs cones
rod-dominated
nocturnal -> rod-dominated; crepuscular / cathemeral / mixed -> mixed; diurnal -> cone-dominated
Derived[13][14][15][16][17][18][19][20]
Motion (flicker fusion)Flicker fusion frequency
84 Hz
median of 1 rows (no bright-light flag) (behavioural/whole-eye ERG rows; all rows: [84.0])
Measured[23]Flicker fusion frequency: 60 Hz Measured[24][25]

All mammals side by side: Mammals: every measurement. Method: how we know what animals see.

Sources

  1. Jacobs et al. 1993
  2. Longcore 2023
  3. Kirwan
  4. Müller et al. 2009
  5. Thermal Activation and Photoactivation of Visual… 2004
  6. Veilleux et al. 2014
  7. Kirk et al. 2004
  8. Heesy 2004
  9. Heffner et al. 1992
  10. Campbell & Green 1965
  11. Miller & Murphy 1995
  12. Kopania et al. 2025
  13. Anderson et al. 2017
  14. Banks et al. 2015
  15. Borges et al. 2018
  16. Wilman et al. 2014
  17. Maor et al. 2017
  18. Jones et al. 2009
  19. Schmitz et al. 2011
  20. Moura et al. 2024
  21. Cervino et al. 2021
  22. Guareschi et al. 2025
  23. Haarlem et al. 2026
  24. Healy et al. 2013
  25. Inger et al. 2014

Every value cites its sources (all sources). Values were extracted from these works and converted (units, medians, derived values); changes are ours, and the listed sources do not endorse this site. Data: catalogue-v1, built 2026-09-29. Accuracy notes: how accurate is this? Method: how we know.