Feeding association between Little Grebes and Mallards

Feeding association between Little Grebes and Mallards

On 10th August 2023, I was watching assorted waterfowl on the Restharrow Scrape at Sandwich Bay, Kent. At 06.20 hrs, I noticed a female Mallard Anas platyrhynchos feeding by upending in emergent vegetation at the water’s edge, accompanied by what I thought were small ducklings. Closer examination showed that these ‘ducklings’ were in fact a family party of Little Grebes Tachybaptus ruficollis, comprising an adult and two young birds, the young both half the size of the adult and still sporting head-stripes typical of juvenile plumage. The group were actively feeding in close proximity to the Mallard; each time the duck pulled up aquatic vegetation, the trio of grebes dived, sometimes going under the duck and emerging on the opposite side with items of prey. The adult would present invertebrate prey for the youngsters to eat but, on occasion, they caught and ate their own invertebrates.

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