Grey-backed Tern vs Black-naped Tern

In short

The Grey-backed Tern and Black-naped Tern are both tropical seabirds, but they can be distinguished by their plumage and behavior. The Grey-backed Tern has a distinctive grey back and is generally shyer, while the Black-naped Tern has a black nape and is more commonly found in coastal areas.

Identification tips

1. Look for the grey back on the Grey-backed Tern, which is absent in the Black-naped Tern. 2. Note the black nape and eye-line on the Black-naped Tern. 3. Observe behavior: Grey-backed Terns are shyer and more pelagic, while Black-naped Terns are more coastal.

Size

Both species are similar in size, typical of medium-sized terns.

Plumage

The Grey-backed Tern has a grey back and a white forehead, contrasting with the Black-naped Tern's white body and distinctive black nape and eye-line.

Behaviour

Grey-backed Terns are shyer and often found nesting on remote islands, while Black-naped Terns are more coastal and less timid.

Habitat

Grey-backed Terns are primarily pelagic and breed on remote islands, whereas Black-naped Terns are more commonly found in coastal regions.