Soft-plumaged Petrel vs Antarctic Prion

In short

The Soft-plumaged Petrel and Antarctic Prion can be distinguished primarily by their structure and plumage. The Soft-plumaged Petrel has a more robust build with a distinctive dark cap and contrasting white face, while the Antarctic Prion is smaller with a more delicate appearance and a characteristic 'M' pattern on its back.

Identification tips

1. Look for the dark cap and white face of the Soft-plumaged Petrel. 2. Note the 'M' pattern on the back of the Antarctic Prion. 3. Compare the overall size and build: Soft-plumaged Petrel is more robust, while Antarctic Prion is smaller and more delicate.

Size

The Soft-plumaged Petrel is generally larger and more robust compared to the smaller and more delicate Antarctic Prion.

Plumage

The Soft-plumaged Petrel features a dark cap and contrasting white face, whereas the Antarctic Prion has a more uniform blue-grey plumage with a distinctive 'M' pattern across its back.