Blue Duck vs Pacific Black Duck

In short

The Blue Duck and Pacific Black Duck can be distinguished by their bill shape and color. The Blue Duck has a unique pale blue-grey bill, while the Pacific Black Duck features a more typical dark bill. These differences are reliable in the field, even at a distance.

Identification tips

1. Look for the pale blue-grey bill of the Blue Duck. 2. Note the dark eye stripe and contrasting brown body of the Pacific Black Duck. 3. Observe the overall plumage color: uniform dark slate-grey for Blue Duck versus patterned for Pacific Black Duck.

Plumage

The Blue Duck has a more uniform dark slate-grey plumage, whereas the Pacific Black Duck displays a distinctive dark eye stripe and lighter brown body, providing a strong contrast.