Erect-crested Penguin vs Snares Penguin
Erect-crested Penguins and Snares Penguins are both Eudyptes — same evolutionary sketchbook, different finished drawings in size (70 cm vs 61 cm) and range. Erect-crested Penguin: Erect-crested Penguins are the awkward question in penguin reproduction: why lay a first egg you almost never raise?. 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.
Erect-crested Penguin
Snares Penguin
Size Comparison
Erect-crested Penguin
50-70 cm
2.5-6 kg
Snares Penguin
51-61 cm
2.5-4 kg
| Feature | Erect-crested Penguin | Snares Penguin |
|---|---|---|
| Conservation | Endangered | Vulnerable |
| Scientific Name | Eudyptes sclateri | Eudyptes robustus |
| Height | 50-70 cm | 51-61 cm |
| Weight | 2.5-6 kg | 2.5-4 kg |
| Lifespan | 15-20 years | 15-20 years |
| Population | ~150,000 breeding pairs | ~25,000 breeding pairs |
| Diet | Krill, Squid, Small fish | Krill, Squid, Small fish |
| Habitat | Rocky coastlines, Sub-Antarctic islands | Sub-Antarctic islands, Rocky shores, Olearia forest |
| Regions | Bounty Islands, Antipodes Islands (New Zealand) | Snares Islands (New Zealand) |
| Genus | Eudyptes | Eudyptes |
Conservation Status
Erect-crested Penguin
EndangeredSnares Penguin
VulnerableScientific Name
Erect-crested Penguin
Eudyptes sclateri
Snares Penguin
Eudyptes robustus
Height
Erect-crested Penguin
50-70 cm
Snares Penguin
51-61 cm
Weight
Erect-crested Penguin
2.5-6 kg
Snares Penguin
2.5-4 kg
Lifespan
Erect-crested Penguin
15-20 years
Snares Penguin
15-20 years
Population
Erect-crested Penguin
~150,000 breeding pairs
Snares Penguin
~25,000 breeding pairs
Diet
Erect-crested Penguin
Krill, Squid, Small fish
Snares Penguin
Krill, Squid, Small fish
Habitat
Erect-crested Penguin
Rocky coastlines, Sub-Antarctic islands
Snares Penguin
Sub-Antarctic islands, Rocky shores, Olearia forest
Regions
Erect-crested Penguin
Bounty Islands, Antipodes Islands (New Zealand)
Snares Penguin
Snares Islands (New Zealand)
Genus
Erect-crested Penguin
Eudyptes
Snares Penguin
Eudyptes
Key Differences
Not a second table — the reasons the numbers diverge.
Survival problem
Erect-crested Penguin: With an extremely restricted breeding range and low reproductive flexibility, this species has very little buffer when conditions turn poor. 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 Erect-crested Penguin is only slightly taller on average — up to 70 cm and 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
Erect-crested Penguins use rocky 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
Erect-crested Penguins live in Bounty Islands and Antipodes Islands (New Zealand); 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.
Both work the same part of the water column
Recorded maximum dives are close — 120 m for the Erect-crested 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 6.0 times as many Erect-crested Penguins as Snares Penguins — ~150,000 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.
Conservation pressure
The Erect-crested Penguin carries the sharper label (Endangered, population ~150,000 breeding pairs) against the Snares Penguin's Vulnerable (~25,000 breeding pairs). Classified as Endangered, with significant population declines over the past several decades. 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
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.
How to read this matchup
Read this pair as one lineage under two constraints. The Erect-crested 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 Erect-crested Penguin for pressure and the Snares Penguin for what a related bird still manages with more margin.
About Each Species
Erect-crested Penguin
Erect-crested Penguins are the awkward question in penguin reproduction: why lay a first egg you almost never raise?
One of the least-known penguin species, named for distinctive upward-pointing yellow crest feathers they can raise and lower at will. They breed on two remote island groups south of New Zealand.
Full Erect-crested 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 Erect-crested Penguin or the Snares Penguin?
The Erect-crested Penguin is larger — up to 70 cm and 6 kg — while the Snares Penguin reaches about 61 cm and 4 kg.
Which is more endangered, the Erect-crested Penguin or the Snares Penguin?
The Erect-crested Penguin sits higher on the IUCN ladder (Endangered, ~150,000 breeding pairs) than the Snares Penguin (Vulnerable, ~25,000 breeding pairs). Classified as Endangered, with significant population declines over the past several decades.
Do Erect-crested Penguins and Snares Penguins live in the same place?
No meaningful range overlap. Erect-crested Penguins: Bounty Islands and Antipodes Islands (New Zealand). Snares Penguins: Snares Islands (New Zealand).
What do Erect-crested Penguins and Snares Penguins eat?
Both take krill, squid, and small fish. Full lists: krill, squid, and small fish for the Erect-crested Penguin; krill, squid, and small fish for the Snares Penguin.
What is the biggest survival difference between Erect-crested Penguins and Snares Penguins?
Erect-crested Penguin: With an extremely restricted breeding range and low reproductive flexibility, this species has very little buffer when conditions turn poor. 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 Erect-crested 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.