What evolutionary advantage do the large combs and wattles seen on many Mediterranean breeds serve in warmer climates?

Answer

They act as radiators to help dissipate excess body heat

Birds from the Mediterranean regions evolved large, prominent combs and wattles which function as extensive fleshy features that help the bird radiate and release excess body heat.

What evolutionary advantage do the large combs and wattles seen on many Mediterranean breeds serve in warmer climates?

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