You fly through the muckducks and your success is determined by a die roll on the chart below:
6 - They are completely thwarted, and they drop 3 clouds and 3 gold.
5 - Only a few make it through, and they drop 3 clouds and 2 gold.
4 - Only a few make it through, and they drop 2 clouds and 2 gold.
3 - About half make it through, and they drop 2 clouds, 1 gold and 1 energy.
2 - Most make it through, and they drop 2 clouds and 2 energy.
1 - Most make it through, and they drop 1 cloud and 2 energy.