rockhopper penguin
Adélie penguins depend on sea ice to survive, making them vulnerable to rising temperatures.
Most of the Adélie penguins' diet is composed of krill.
Blood samples from hundreds of Adelie penguins in Antarctica indicate genetic differences that reflect two distinct lineages.
The expedition will offer opportunities for close encounters with humpback, minke and orca whales, leopard seals, and adelie penguins.

SMART Vocabulary: related words and phrases

Birds found by or on the sea
albatross
booby
cormorant
curlew
emperor penguin
gannet
gentoo penguin
guillemot
gull
Humboldt penguin
kittiwake
oystercatcher
penguin
petrel
plover
rockhopper penguin
seagull
shag
skimmer
skua