How does the Roseate Spoonbill detect small prey like aquatic insects while sweeping its bill in shallow water?

Answer

By detecting small prey through touch using the sensitive, flattened bill end

The Roseate Spoonbill employs a highly specialized feeding technique that relies heavily on tactile sensation rather than sight. While wading, it submerges part of its spatulate bill just beneath the surface and swings its head rhythmically from side to side. This sweeping motion allows the sensitive, flattened end of the bill to detect minute prey, such as tiny shrimp or aquatic insects, purely through physical contact. Once detected, the bill snaps shut rapidly, trapping the food while allowing water to pass through the slightly opened bill.

How does the Roseate Spoonbill detect small prey like aquatic insects while sweeping its bill in shallow water?

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