Emperor Penguin vs Snares Penguin
Put an Emperor Penguin (130 cm) beside a Snares Penguin (61 cm) and the penguin family stops looking like one interchangeable bird. Emperor Penguin: The Emperor Penguin is not built to defeat Antarctic winter. It survives by turning a breeding pair into a relay team, with the male becoming a walking incubator on sea ice. 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. Start with the table, then read what the gaps between those rows actually cost.
Emperor Penguin
Snares Penguin
Size Comparison
Emperor Penguin
100-130 cm
22-45 kg
Snares Penguin
51-61 cm
2.5-4 kg
| Feature | Emperor Penguin | Snares Penguin |
|---|---|---|
| Conservation | Endangered | Vulnerable |
| Scientific Name | Aptenodytes forsteri | Eudyptes robustus |
| Height | 100-130 cm | 51-61 cm |
| Weight | 22-45 kg | 2.5-4 kg |
| Lifespan | 15-20 years | 15-20 years |
| Population | ~595,000 individuals | ~25,000 breeding pairs |
| Diet | Fish, Squid, Krill | Krill, Squid, Small fish |
| Habitat | Antarctic sea ice, Antarctic coastline | Sub-Antarctic islands, Rocky shores, Olearia forest |
| Regions | Antarctica | Snares Islands (New Zealand) |
| Genus | Aptenodytes | Eudyptes |
Conservation Status
Emperor Penguin
EndangeredSnares Penguin
VulnerableScientific Name
Emperor Penguin
Aptenodytes forsteri
Snares Penguin
Eudyptes robustus
Height
Emperor Penguin
100-130 cm
Snares Penguin
51-61 cm
Weight
Emperor Penguin
22-45 kg
Snares Penguin
2.5-4 kg
Lifespan
Emperor Penguin
15-20 years
Snares Penguin
15-20 years
Population
Emperor Penguin
~595,000 individuals
Snares Penguin
~25,000 breeding pairs
Diet
Emperor Penguin
Fish, Squid, Krill
Snares Penguin
Krill, Squid, Small fish
Habitat
Emperor Penguin
Antarctic sea ice, Antarctic coastline
Snares Penguin
Sub-Antarctic islands, Rocky shores, Olearia forest
Regions
Emperor Penguin
Antarctica
Snares Penguin
Snares Islands (New Zealand)
Genus
Emperor Penguin
Aptenodytes
Snares Penguin
Eudyptes
Key Differences
Not a second table — the reasons the numbers diverge.
Survival problem
Emperor Penguin: Everything about an emperor colony depends on stable sea ice lasting long enough for one chick to hatch, survive the coldest weeks of the year, and meet open water again before the platform breaks apart. 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. 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 Emperor Penguin is nearly twice as tall on average — up to 130 cm and 45 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
Emperor Penguins use antarctic sea ice and antarctic coastline; Snares Penguins use sub-antarctic islands, rocky shores, and olearia forest. 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
Emperor Penguins live in Antarctica; Snares Penguins live in Snares Islands (New Zealand). 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
Emperor Penguins eat fish, squid, and krill; Snares Penguins eat krill, squid, and small fish. Distinct items on each list (fish versus small fish) hint at different dive depths and foraging schedules. Both still lean on squid and krill, so ocean productivity swings can hit them together.
Dive depth
The Emperor Penguin reaches 565 m — 5 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.
Clutch size
The Emperor Penguin lays 1 egg per season; the Snares Penguin lays 2. A single-egg strategy concentrates everything into one chick and leaves no margin if it fails, which is why single-egg species tend to invest far longer in incubation — here 64–67 days against 31–37.
Abundance
There are roughly 12 times as many Emperor Penguins as Snares Penguins — ~595,000 individuals against ~25,000 breeding pairs. Rarity is not the same as risk, but it sets how little has to go wrong before a decline becomes irreversible.
Conservation pressure
The Emperor Penguin carries the sharper label (Endangered, population ~595,000 individuals) against the Snares Penguin's Vulnerable (~25,000 breeding pairs). Uplisted from Near Threatened to Endangered on the IUCN Red List in April 2026, in an assessment coordinated by BirdLife International. The lower-risk bird is not “safe”; it simply has a wider margin before the same kinds of ocean or land failure become terminal.
Key Similarities
Same family, different genera
Both are penguins in Spheniscidae, yet they sit in different genera (Aptenodytes vs Eudyptes). 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 and krill. 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
Most birds solve incubation by sitting on a nest. 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. 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: Emperor Penguin versus Snares Penguin, Aptenodytes versus Eudyptes, Endangered versus Vulnerable. Use the profiles for depth — this page is the decision tree for which difference matters first.
About Each Species
Emperor Penguin
The Emperor Penguin is not built to defeat Antarctic winter. It survives by turning a breeding pair into a relay team, with the male becoming a walking incubator on sea ice.
The largest penguin species, Emperor Penguins are the only animal to breed during the Antarctic winter, trekking up to 120 km over sea ice to reach their colonies and enduring temperatures below −40 °C.
Full Emperor Penguin profileSnares 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 profileFrequently Asked Questions
Which is bigger, the Emperor Penguin or the Snares Penguin?
The Emperor Penguin is larger — up to 130 cm and 45 kg — while the Snares Penguin reaches about 61 cm and 4 kg.
Which is more endangered, the Emperor Penguin or the Snares Penguin?
The Emperor Penguin sits higher on the IUCN ladder (Endangered, ~595,000 individuals) than the Snares Penguin (Vulnerable, ~25,000 breeding pairs). Uplisted from Near Threatened to Endangered on the IUCN Red List in April 2026, in an assessment coordinated by BirdLife International.
Do Emperor Penguins and Snares Penguins live in the same place?
No meaningful range overlap. Emperor Penguins: Antarctica. Snares Penguins: Snares Islands (New Zealand).
What do Emperor Penguins and Snares Penguins eat?
Both take squid and krill. Full lists: fish, squid, and krill for the Emperor Penguin; krill, squid, and small fish for the Snares Penguin.
What is the biggest survival difference between Emperor Penguins and Snares Penguins?
Emperor Penguin: Everything about an emperor colony depends on stable sea ice lasting long enough for one chick to hatch, survive the coldest weeks of the year, and meet open water again before the platform breaks apart. 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.
Are Emperor Penguins and Snares Penguins closely related?
They are both penguins (Spheniscidae) but sit in different genera: Aptenodytes (Emperor Penguin) and Eudyptes (Snares Penguin). That is family-level relatedness, not a close sister-species pair.