Black-naped Tern vs Great Crested Tern

In short

The bill shape and size are key differences: the Black-naped Tern has a slender, all-black bill, while the Great Crested Tern features a thicker, yellow bill. Additionally, the Black-naped Tern is smaller and more delicate in appearance compared to the robust Great Crested Tern.

Identification tips

• Bill: Black-naped Tern has a slender, all-black bill; Great Crested Tern has a thicker, yellow bill.
• Size: Black-naped Tern is smaller and more delicate; Great Crested Tern is larger and more robust.
• Plumage: Look for the black nape on the Black-naped Tern and the pronounced crest on the Great Crested Tern.

Size

The Black-naped Tern is smaller and more slender, while the Great Crested Tern is larger and more robust.

Plumage

Both species have predominantly white plumage, but the Black-naped Tern has a distinctive black nape and a more delicate appearance. The Great Crested Tern has a black cap extending to the nape and a more pronounced crest.