Pardela Cenicienta (atlántica) vs Pardillo Sizerín

Cory's Shearwater and Redpoll are easily distinguished by size and habitat. Cory's Shearwater is a large seabird often seen gliding over oceans, while the Redpoll is a small, finch-like bird found in colder, terrestrial environments.

Check size and habitat first: Cory's Shearwater is much larger and found over oceans, while Redpolls are small and terrestrial. Look for plumage details: Redpolls have a distinctive red cap and streaked underparts, unlike the more uniform plumage of Cory's Shearwater.

Cory's Shearwater is significantly larger than the Redpoll, with a wingspan that can be over a meter, compared to the small, sparrow-sized Redpoll.

Cory's Shearwater has a more uniform, muted plumage with brownish-grey upperparts and white underparts. In contrast, Redpolls have dense, fluffy plumage with a distinctive red cap and often streaked underparts.

Cory's Shearwater is known for its gliding flight over open water, whereas Redpolls are more likely to be seen flitting among trees or shrubs, often in flocks.

Cory's Shearwater is typically found over open oceans, while Redpolls inhabit cold, terrestrial environments, often in arctic or subarctic regions.