painho-de-barriga-preta vs petrel-grande-do-norte

The Black-bellied Storm-Petrel and Northern Giant-Petrel are easily distinguished by size and plumage. The Black-bellied Storm-Petrel is much smaller, with a distinctive black central belly stripe, while the Northern Giant-Petrel is larger and lacks this feature. In flight, the Black-bellied Storm-Petrel's longer legs project beyond the tail, unlike the Northern Giant-Petrel.

Size: Look for the smaller size of the Black-bellied Storm-Petrel. Belly Stripe: Check for the black central belly stripe on the Black-bellied Storm-Petrel. Leg Projection: In flight, note the longer legs of the Black-bellied Storm-Petrel projecting beyond the tail.

The Black-bellied Storm-Petrel is significantly smaller than the Northern Giant-Petrel.

The Black-bellied Storm-Petrel has a bold black central belly stripe and darker upperparts, while the Northern Giant-Petrel lacks this belly stripe.

Black-bellied Storm-Petrel prefers colder, sub-Antarctic waters, whereas Northern Giant-Petrel does not have this specific preference.