When congregating near human activity, what specific food waste product derived from cleaning fish does the opportunistic Xeme consume?
Answer
Offal
A key aspect of the Sabine's Gull's opportunistic feeding strategy involves scavenging associated with human activity. When they congregate near fishing vessels, they actively follow these boats to exploit readily available caloric sources. The specific waste product mentioned that they consume consists of offal, which is defined as the waste products resulting from the cleaning and processing of fish onboard the trawlers. This scavenging provides an essential, easily accessible energy source, especially important during migration stopovers.

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