My bother sent me this picture of a pair of Great Crested Grebes (Podiceps cristatus) with their chicks, which you can see riding on a parent's back.
The RSPB describes the bird like this
'a delightful, elegant waterbird with decorative head plumes'
About
Courtship
These birds are famous for their courtship ritual, often described as a dance.
A floating nest
Their nest is a floating platform of reeds and other vegetation.
In at the Deep End
The chicks ride on a parent's and when the parent dives down they go too! But they take to it like ... Grebes to water.
Victorian Ladies' Headgear
Their head plumes were an object of fashion in the 19th century, which brought the species to the brink of extinction.
The name
From French grèbe, so much is certain. Possibly this is a borrowing into French from Breton, related to Welsh crib, 'crest', including of a mountain ridge. or 'comb' as in a cock's comb. But this is not universally accepted.