Snares Penguin vs Yellow-eyed Penguin
Snares Penguins and Yellow-eyed Penguins share the penguin toolkit — flippers, countershading, marine hunting — then spend it on different habitats and life histories. Snares Penguin: The Snares Penguin is what happens when an entire species bets on one remote island group staying dependable for a very long time. Yellow-eyed Penguin: Yellow-eyed Penguins do not behave like tidy colony birds. They breed like private recluses, which makes every breeding pair feel expensive. Everything below is measurable. The part worth arguing about is what it implies.
Snares Penguin
Yellow-eyed Penguin
Size Comparison
Snares Penguin
51-61 cm
2.5-4 kg
Yellow-eyed Penguin
62-79 cm
4.5-8.5 kg
| Feature | Snares Penguin | Yellow-eyed Penguin |
|---|---|---|
| Conservation | Vulnerable | Endangered |
| Scientific Name | Eudyptes robustus | Megadyptes antipodes |
| Height | 51-61 cm | 62-79 cm |
| Weight | 2.5-4 kg | 4.5-8.5 kg |
| Lifespan | 15-20 years | 8-25 years |
| Population | ~25,000 breeding pairs | ~3,400 individuals |
| Diet | Krill, Squid, Small fish | Fish, Squid, Crustaceans |
| Habitat | Sub-Antarctic islands, Rocky shores, Olearia forest | Coastal forests, Scrubland, Sandy beaches |
| Regions | Snares Islands (New Zealand) | New Zealand, Auckland Islands, Campbell Islands |
| Genus | Eudyptes | Megadyptes |
Conservation Status
Snares Penguin
VulnerableYellow-eyed Penguin
EndangeredScientific Name
Snares Penguin
Eudyptes robustus
Yellow-eyed Penguin
Megadyptes antipodes
Height
Snares Penguin
51-61 cm
Yellow-eyed Penguin
62-79 cm
Weight
Snares Penguin
2.5-4 kg
Yellow-eyed Penguin
4.5-8.5 kg
Lifespan
Snares Penguin
15-20 years
Yellow-eyed Penguin
8-25 years
Population
Snares Penguin
~25,000 breeding pairs
Yellow-eyed Penguin
~3,400 individuals
Diet
Snares Penguin
Krill, Squid, Small fish
Yellow-eyed Penguin
Fish, Squid, Crustaceans
Habitat
Snares Penguin
Sub-Antarctic islands, Rocky shores, Olearia forest
Yellow-eyed Penguin
Coastal forests, Scrubland, Sandy beaches
Regions
Snares Penguin
Snares Islands (New Zealand)
Yellow-eyed Penguin
New Zealand, Auckland Islands, Campbell Islands
Genus
Snares Penguin
Eudyptes
Yellow-eyed Penguin
Megadyptes
Key Differences
Not a second table — the reasons the numbers diverge.
Survival problem
Snares Penguin: Its breeding range is tiny, so any sustained change in nearby food supply, disease, or island conditions matters at species scale almost immediately. Yellow-eyed Penguin: Hoiho need quiet nest cover, dependable benthic foraging grounds, and enough adult survival in a very small population already under pressure from disease, predators, and disturbance. Those two sentences are the comparison’s spine — stats only make sense if they map back to the problem each bird is actually solving.
Size and mass
The Yellow-eyed Penguin is noticeably taller on average — up to 79 cm and 8.5 kg against the Snares Penguin's 61 cm and 4 kg. That gap changes dive physics, fasting capacity, and how each bird spends energy on land and at sea.
Habitat logic
Snares Penguins use sub-antarctic islands, rocky shores, and olearia forest; Yellow-eyed Penguins use coastal forests, scrubland, and sandy beaches. There is little shared nesting or haul-out habitat between them. Habitat here is architecture, not scenery: shelter, predators, and access to prey decide who can breed successfully.
Separate ranges
Snares Penguins live in Snares Islands (New Zealand); Yellow-eyed Penguins live in New Zealand, Auckland Islands, and Campbell Islands. Non-overlapping ranges usually mean different currents, predator guilds, and fisheries pressure — which is why conservation headlines for one rarely transfer cleanly to the other.
What they hunt
Snares Penguins eat krill, squid, and small fish; Yellow-eyed Penguins eat fish, squid, and crustaceans. Distinct items on each list (krill and small fish versus fish and crustaceans) hint at different dive depths and foraging schedules. Both still lean on squid, so ocean productivity swings can hit them together.
Dive depth
The Yellow-eyed Penguin reaches 160 m — around 1.3 times the Snares Penguin's 120 m. Depth buys access to prey that shallower divers never reach, and it is paid for in oxygen storage, muscle chemistry, and the time each foraging trip takes.
Incubation length
Both lay 2 eggs, but the Yellow-eyed Penguin incubates for 39–51 days against the Snares Penguin's 31–37. Every extra day on the nest is a day of fasting for one partner and a day the egg is exposed to whatever the season does next.
Abundance
There are roughly 15 times as many Snares Penguins as Yellow-eyed Penguins — ~25,000 breeding pairs against ~3,400 individuals. Rarity is not the same as risk, but it sets how little has to go wrong before a decline becomes irreversible.
Conservation pressure
The Yellow-eyed Penguin carries the sharper label (Endangered, population ~3,400 individuals) against the Snares Penguin's Vulnerable (~25,000 breeding pairs). Classified as Endangered by the IUCN and listed as threatened under U. The lower-risk bird is not “safe”; it simply has a wider margin before the same kinds of ocean or land failure become terminal.
Lifespan window
Yellow-eyed Penguins are built for a longer adult career (8–25 years) than Snares Penguins (15–20 years). Longer lives amplify the cost of a bad breeding decade; shorter lives put more pressure on every successful chick year.
Key Similarities
Same family, different genera
Both are penguins in Spheniscidae, yet they sit in different genera (Eudyptes vs Megadyptes). That distance usually shows up as different colony style, crest or band patterns, and how hard each bird depends on a single prey or ice type.
Overlapping prey
They both take squid. Shared prey is a coupling: a krill or forage-fish crash can stress both populations even when colonies sit far apart.
Why both still feel like penguins
Snares Penguins can form dense, loud colonies under vegetation on a place many people will never see, which makes them both well protected and strangely vulnerable. Instead of packing into giant colonies, they spread out through coastal vegetation and forest edges, making them feel more like secretive land birds that happen to be elite divers. Underneath those quirks sit the same flightless, flipper-driven design that makes every living penguin a swimming specialist rather than an aerial one.
How to read this matchup
Read this pair as distant solutions to “how to be a penguin.” Size, genus, and risk already point different ways: Yellow-eyed Penguin versus Snares Penguin, Eudyptes versus Megadyptes, Vulnerable versus Endangered. Use the profiles for depth — this page is the decision tree for which difference matters first.
About Each Species
Snares Penguin
The Snares Penguin is what happens when an entire species bets on one remote island group staying dependable for a very long time.
Endemic to the tiny Snares Islands south of New Zealand, this yellow-crested penguin has the most restricted range of any penguin species, yet maintains a healthy population thanks to the absence of introduced predators.
Full Snares Penguin profileYellow-eyed Penguin
Yellow-eyed Penguins do not behave like tidy colony birds. They breed like private recluses, which makes every breeding pair feel expensive.
Known as Hoiho ('noise shouter') in Māori, this large, pale-faced penguin endemic to New Zealand is one of the world's rarest, unique among penguins for being largely solitary and nesting out of sight of others.
Full Yellow-eyed Penguin profileFrequently Asked Questions
Which is bigger, the Snares Penguin or the Yellow-eyed Penguin?
The Yellow-eyed Penguin is larger — up to 79 cm and 8.5 kg — while the Snares Penguin reaches about 61 cm and 4 kg.
Which is more endangered, the Snares Penguin or the Yellow-eyed Penguin?
The Yellow-eyed Penguin sits higher on the IUCN ladder (Endangered, ~3,400 individuals) than the Snares Penguin (Vulnerable, ~25,000 breeding pairs). Classified as Endangered by the IUCN and listed as threatened under U.
Do Snares Penguins and Yellow-eyed Penguins live in the same place?
No meaningful range overlap. Snares Penguins: Snares Islands (New Zealand). Yellow-eyed Penguins: New Zealand, Auckland Islands, and Campbell Islands.
What do Snares Penguins and Yellow-eyed Penguins eat?
Both take squid. Full lists: krill, squid, and small fish for the Snares Penguin; fish, squid, and crustaceans for the Yellow-eyed Penguin.
What is the biggest survival difference between Snares Penguins and Yellow-eyed Penguins?
Snares Penguin: Its breeding range is tiny, so any sustained change in nearby food supply, disease, or island conditions matters at species scale almost immediately. Yellow-eyed Penguin: Hoiho need quiet nest cover, dependable benthic foraging grounds, and enough adult survival in a very small population already under pressure from disease, predators, and disturbance.
Are Snares Penguins and Yellow-eyed Penguins closely related?
They are both penguins (Spheniscidae) but sit in different genera: Eudyptes (Snares Penguin) and Megadyptes (Yellow-eyed Penguin). That is family-level relatedness, not a close sister-species pair.
Which lives longer, the Snares Penguin or the Yellow-eyed Penguin?
The Yellow-eyed Penguin generally has the longer window (8–25 years) versus 15–20 years for the Snares Penguin.