All birds have a small white wing patch which is not always visible, and a thin pointed bill.

In the fall, it can still be identified from other similar warblers by its small white wing patch.

It is the only grebe that does not show a white wing patch in flight.

They are mainly black, with a white face and large white wing patches.

Its upperparts are deep brown, sometimes almost black, and it has no light wing patch.

The latter has a far more extensive white wing patch.

The female has a smaller red wing patch, and more slaty head.

The male has a brilliant blue wing patch, and females sometimes have some yellow on the head.

Its large, white wing patches are obvious in flight, but mostly covered when the bird is sitting.

It has a yellow lower belly and white wing patches, which are obvious in flight.