Do Shovelers prefer certain food sources during migration?

Foraging Techniques

During migration, shovelers adjust their foraging techniques to match the available food sources. In wetlands with abundant vegetation, they use their broad, shovel-shaped bills to probe the mud and silt for invertebrates like crayfish, snails, and aquatic insects. In aquatic habitats with limited vegetation, they shift their foraging to the water’s surface, where they use their bills to filter small aquatic animals like zooplankton and tiny crustaceans.

Food Preferences by Habitat

Shovelers’ food preferences vary significantly across different habitats. In freshwater habitats, they tend to focus on crayfish and snails, which are common in shallow, vegetated areas. In brackish and saltwater habitats, they shift their focus to small aquatic animals, including brine shrimp, small fish, and plankton. In agricultural fields and other terrestrial habitats, they forage for grains, seeds, and small invertebrates like grasshoppers and crickets.

Key Foraging Strategies

Shovelers employ several key foraging strategies during migration. They often forage in shallow waters, typically less than 1 meter deep, where invertebrates and small aquatic animals are more abundant. They also use their powerful legs to kick up sediment and expose hidden invertebrates, and their broad bills to filter small animals from the water. By adjusting their foraging techniques and preferences to match the available food sources, shovelers are able to successfully complete their migrations and thrive in a wide range of habitats.