Macaroni Penguin vs Snares Penguin
Macaroni Penguins and Snares Penguins are both Eudyptes — same evolutionary sketchbook, different finished drawings in size (77 cm vs 61 cm) and range. Macaroni Penguin: Macaroni Penguins may be among the most numerous penguins on Earth, which makes them dangerous to underestimate. A giant population can still be living on borrowed ecological luck. 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.
Macaroni Penguin
Snares Penguin
Size Comparison
Macaroni Penguin
51-77 cm
3.3-6.6 kg
Snares Penguin
51-61 cm
2.5-4 kg
| Feature | Macaroni Penguin | Snares Penguin |
|---|---|---|
| Conservation | Vulnerable | Vulnerable |
| Scientific Name | Eudyptes chrysolophus | Eudyptes robustus |
| Height | 51-77 cm | 51-61 cm |
| Weight | 3.3-6.6 kg | 2.5-4 kg |
| Lifespan | 8-15 years | 15-20 years |
| Population | ~6.3 million breeding pairs | ~25,000 breeding pairs |
| Diet | Krill, Squid, Small fish, Crustaceans | Krill, Squid, Small fish |
| Habitat | Rocky, cliff-bound coastlines, Sub-Antarctic islands | Sub-Antarctic islands, Rocky shores, Olearia forest |
| Regions | South Georgia, Falkland Islands, Crozet Islands, Kerguelen Islands, Heard Island, South Sandwich Islands | Snares Islands (New Zealand) |
| Genus | Eudyptes | Eudyptes |
Conservation Status
Macaroni Penguin
VulnerableSnares Penguin
VulnerableScientific Name
Macaroni Penguin
Eudyptes chrysolophus
Snares Penguin
Eudyptes robustus
Height
Macaroni Penguin
51-77 cm
Snares Penguin
51-61 cm
Weight
Macaroni Penguin
3.3-6.6 kg
Snares Penguin
2.5-4 kg
Lifespan
Macaroni Penguin
8-15 years
Snares Penguin
15-20 years
Population
Macaroni Penguin
~6.3 million breeding pairs
Snares Penguin
~25,000 breeding pairs
Diet
Macaroni Penguin
Krill, Squid, Small fish, Crustaceans
Snares Penguin
Krill, Squid, Small fish
Habitat
Macaroni Penguin
Rocky, cliff-bound coastlines, Sub-Antarctic islands
Snares Penguin
Sub-Antarctic islands, Rocky shores, Olearia forest
Regions
Macaroni Penguin
South Georgia, Falkland Islands, Crozet Islands, Kerguelen Islands, Heard Island, South Sandwich Islands
Snares Penguin
Snares Islands (New Zealand)
Genus
Macaroni Penguin
Eudyptes
Snares Penguin
Eudyptes
Key Differences
Not a second table — the reasons the numbers diverge.
Survival problem
Macaroni Penguin: Macaronis have to feed enormous krill-driven colonies, so sustained changes in Southern Ocean productivity hit them at industrial scale. 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 Macaroni Penguin is only slightly taller on average — up to 77 cm and 6.6 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
Macaroni Penguins use rocky, cliff-bound coastlines and sub-antarctic islands; Snares Penguins use sub-antarctic islands, rocky shores, and olearia forest. They do share some ground — sub-antarctic islands — but the remaining habitat split still forces different nesting and commute solutions. Habitat here is architecture, not scenery: shelter, predators, and access to prey decide who can breed successfully.
Separate ranges
Macaroni Penguins live in South Georgia, Falkland Islands, Crozet Islands, Kerguelen Islands, Heard Island, and South Sandwich Islands; 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
Macaroni Penguins eat krill, squid, small fish, and crustaceans; Snares Penguins eat krill, squid, and small fish. Both still lean on krill, squid, and small fish, so ocean productivity swings can hit them together.
Both work the same part of the water column
Recorded maximum dives are close — 115 m for the Macaroni Penguin against 120 m for the Snares Penguin. When two penguins hunt at the same depth they are usually competing for the same prey layer, which makes where they breed matter more than how they hunt.
Abundance
There are roughly 250 times as many Macaroni Penguins as Snares Penguins — ~6.3 million breeding pairs 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.
Shared risk band
Both sit at IUCN Vulnerable. Estimated numbers still differ — ~6.3 million breeding pairs for the Macaroni Penguin versus ~25,000 breeding pairs for the Snares Penguin. Even under the same IUCN label, trends differ: Macaroni Penguins are tracked as decreasing, while Snares Penguins are stable. A shared status means comparable risk class, not identical causes.
Lifespan window
Snares Penguins are built for a longer adult career (15–20 years) than Macaroni Penguins (8–15 years). Longer lives amplify the cost of a bad breeding decade; shorter lives put more pressure on every successful chick year.
Key Similarities
Shared genus: Eudyptes
Both belong to Eudyptes, so they inherit a related body plan and many of the same physiological constraints. Related does not mean interchangeable — size, range, and breeding rules still split them — but it explains why field marks and moult timing can look related even when habitats diverge.
Overlapping prey
They both take krill, squid, and small fish. Shared prey is a coupling: a krill or forage-fish crash can stress both populations even when colonies sit far apart.
Shared habitat type
Both use sub-antarctic islands. That common stage rewards the same basics — dense waterproofing, heat control, and a reliable commute between nest and productive water — while still leaving room for different nest architecture.
Both Vulnerable
IUCN places both at Vulnerable. Treat that as a risk band, not a single storyline: the Macaroni Penguin and Snares Penguin can share a label while failing for different local reasons.
How to read this matchup
Read this pair as one lineage under two constraints. The Macaroni Penguin shows the bigger expression of the Eudyptes plan; the Snares Penguin shows how far that plan can shrink or specialise. When risk differs, follow the Macaroni Penguin for pressure and the Snares Penguin for what a related bird still manages with more margin.
About Each Species
Macaroni Penguin
Macaroni Penguins may be among the most numerous penguins on Earth, which makes them dangerous to underestimate. A giant population can still be living on borrowed ecological luck.
One of the most numerous penguin species with an estimated 6.3 million breeding pairs, named after the flamboyant 18th-century 'Macaroni' fashion trend. Despite their huge numbers, they are Vulnerable due to rapid declines.
Full Macaroni 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 Macaroni Penguin or the Snares Penguin?
The Macaroni Penguin is larger — up to 77 cm and 6.6 kg — while the Snares Penguin reaches about 61 cm and 4 kg.
Are Macaroni Penguins or Snares Penguins more endangered?
Both are listed as Vulnerable. Numbers still differ: ~6.3 million breeding pairs for the Macaroni Penguin versus ~25,000 breeding pairs for the Snares Penguin. Trends: decreasing vs stable.
Do Macaroni Penguins and Snares Penguins live in the same place?
No meaningful range overlap. Macaroni Penguins: South Georgia, Falkland Islands, Crozet Islands, Kerguelen Islands, Heard Island, and South Sandwich Islands. Snares Penguins: Snares Islands (New Zealand).
What do Macaroni Penguins and Snares Penguins eat?
Both take krill, squid, and small fish. Full lists: krill, squid, small fish, and crustaceans for the Macaroni Penguin; krill, squid, and small fish for the Snares Penguin.
What is the biggest survival difference between Macaroni Penguins and Snares Penguins?
Macaroni Penguin: Macaronis have to feed enormous krill-driven colonies, so sustained changes in Southern Ocean productivity hit them at industrial scale. 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 Macaroni Penguins and Snares Penguins closely related?
Yes — both are genus Eudyptes within Spheniscidae, so they share a relatively recent common ancestor and related anatomy, even when range and size diverge.
Which lives longer, the Macaroni Penguin or the Snares Penguin?
The Snares Penguin generally has the longer window (15–20 years) versus 8–15 years for the Macaroni Penguin.