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How does the little penguin see?

Eudyptula minor · order Sphenisciformes · Birds

Estimated: the little penguin has 3 colour receptor classes (403, 450 and 543 nm), like most people.[1] Its sharpest vision resolves 17.46 cycles per degree, against 63.75 for people in this dataset.[5][6] Its eyes cover about 282° with 27.5° seen by both eyes.[21] The little penguin stops seeing flicker at 88.5 Hz, against 60 Hz for people.[37][38][39][40][41]

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  • 3colour receptor classesEstimated
  • 17.46cycles per degree (sharpness)Measured
  • 282°field of viewEstimated
  • 88.5hertz flicker fusion (motion)Estimated

The little penguin (Eudyptula minor) is a bird in the order Sphenisciformes. Its eyes belong to the vision type Penguin (underwater-tuned bird): cones shifted towards blue, no ultraviolet cone and a flat cornea for focusing under water. Measured in this species: sharpness and night vision. Measured colour or sharpness: a measured receptor set or acuity in this species; other dials come from relatives or group defaults.

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 the little penguin sees: colour receptors

Little penguin colour receptor peaks, 300 to 700 nmLittle penguin: 3 receptor peaks at 403, 450, 543 nm; you: 3 at 421.5, 532, 558.4 nm. ultraviolet300400500600700
Little penguin: 403, 450, 543 nmPeople: 421.5, 532, 558.4 nmWavelength in nanometres

What does a little penguin's vision look like?

Estimated: the little penguin has 3 colour receptor classes (403, 450 and 543 nm), like most people.[1] Fine detail is blurred to what 17.46 cycles per degree can resolve.

Can the little penguin see colour?

Yes. The little penguin has 3 colour receptor classes (403, 450 and 543 nm), like most people; people have 3.[1]

How far can the little penguin see?

Distance depends on the size of what is seen, so sharpness is the measure. The little penguin resolves 17.46 cycles per degree, against 63.75 for people in this dataset, so a detail must be about 3.7 times larger, or that much closer, for it to make it out as well as a person.[5][6]

Can the little penguin see in the dark?

The catalogue records activity pattern: diurnal and rods vs cones: cone-dominated. Night mode in the tool uses these traits by a stated engine rule, not a measured sensitivity.[26][27]

Does the little penguin see in slow motion?

The little penguin stops seeing flicker at 88.5 Hz, against 60 Hz for people in this dataset. So it sees fast motion in about 1.5 times as many steps: to it, our fast motion looks slower.[37][38][39][40][41]

What stands out

  • It has three colour receptor classes, like most people.
  • Its sharpest vision resolves 17.46 cycles per degree: the finest stripe pattern it can tell apart from grey.
  • Its eyes cover about 282° around the head, with 27.5° seen by both eyes at once.
  • It stops seeing flicker at 88.5 Hz, against 60 Hz for people in this dataset, so fast motion looks about 1.5 times slower to it.[39][40]
  • Activity pattern: diurnal.

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 little penguin (Eudyptula minor), catalogue-v1
DialValueEvidenceSourcesPeople
ColourColour receptors
3 receptor classes: 403 nm (VS/SWS (violet)), 450 nm (SWS (blue)), 543 nm (LWS (long))
receptor set of nearest measured relative Spheniscus humboldti (same family Spheniscidae)
Estimated[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)[1][2][3][4]
SharpnessAcuity
17.46 cycles per degree
median of 2 anatomical-ganglion rows (method priority rule)
Measured[5][6]Acuity: 63.75 cycles per degree Measured[7][8]
Field of viewBinocular overlap
27.5°
median of 133 relatives in class Aves: Accipiter cooperii, Spatula clypeata, Mareca penelope, Anas platyrhynchos, Ardeola ralloides, Baeolophus bicolor
Group default[9][10][11][12][13][14][15][16][17]Binocular overlap: 122.5° Measured[18][19]
Total field of view: 200° Measured (not re-verified)[20]
Blind area behind the head: 160° Derived[20]
Eye placement: frontal Derived[18][19]
Total field of view
282°
median species-v1 total field of family Spheniscidae: Spheniscus humboldti
Estimated[21]
Sharp zones (foveas)Number of foveas
1
median of 48 relatives in class Aves: Branta canadensis, Cardinalis cardinalis, Passerina cyanea, Zenaida macroura, Cyanocitta cristata, Junco hyemalis
Group default[22][23][24]Number of foveas: 1 Measured[25]
Fovea type: fovea Measured[25]
Fovea type
single central fovea (displaced dorso-temporally from retinal centre)		Group default[22][23][24]
Night visionActivity pattern
diurnal
mode of 2 rows (of 2 rows): diurnal; not_nocturnal
Measured (not re-verified)[26][27]Activity pattern: diurnal Measured (not re-verified)[28][29][30][1][31][32][33][27]
Pupil shape: vertical Group default[34][35]
Reflective layer (tapetum): no Measured[36]
Rods vs cones: cone-dominated Derived[28][29][30][1][31][32][33][27]
Rods vs cones
cone-dominated
nocturnal -> rod-dominated; crepuscular / cathemeral / mixed -> mixed; diurnal -> cone-dominated
Derived[26][27]
Motion (flicker fusion)Flicker fusion frequency
88.5 Hz
median of 17 relatives in class Aves: Bubo virginianus, Melopsittacus undulatus, Passer domesticus, Taeniopygia guttata, Columba livia, Calypte anna
Group default[37][38][39][40][41]Flicker fusion frequency: 60 Hz Measured[39][40]

Related animals

The same tulips as a Humboldt penguin sees them.Humboldt penguinPenguin (underwater-tuned bird)

More birds: all birds with measured vision data. Same eye type: Penguin (underwater-tuned bird).

Sources

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  2. Kirwan J. luxR 0.1.1: Underwater Light Analysis and Visual Ecology (R-universe), data species_sensitivities. github.com/JohnKirwan/luxR
  3. Müller B, Glösmann M, Peichl L, Knop GC, Hagemann C, Ammermüller J (2009) Bat eyes have ultraviolet-sensitive cone photoreceptors. PLoS ONE 4:e6390
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  20. species_v1:Campbell & Green 1965
  21. species_v1:Hadden & Zhang 2023 (Table 1, primary ref [47])
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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.