Feeding
The Royal Spoonbill is carnivorous, catching small animals by sweeping its bill through shallow water and swallowing prey once detected. When slow sweeping, the spoonbill walks slowly with the bill perpendicular to the water surface (i.e. vertical) with the bill tip open about 2 to 4 cm (0.8-1.6 in), sweeping an arc of around 100 degrees in front of the bird. The bird walks slowly, kicking up debris and small animals from the bottom of the body of water, which it senses and catches with its bill. When an item is sensed, the spoonbill switches to intensive sweeping of a small area. Royal Spoonbills also probe submerged plants directly for prey, and seize prey such as spiders above ground. They have also been observed dragging their bills through shallow water alongside them while walking.
Prey items recorded at Lake Cowal include freshwater crustaceans such as the common yabby (Cherax destructor), shrmp of the genus Macrobrachium and family Atyidae, insects, particularly aquatic bugs of the families Notonectidae and Corixidae, fish such as mosquitofish (Gambusia affinis) and goldfish (Carassius auratus), and oocasionally freshwater snails and plant material such as medic burr (Medicago polymorpha).
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