 Puffins, like many auks  feed on fish and zooplankton , and it is not known if man-made causes, such as over-fishing or climate change  have lowered the amount of food available to puffins, causing them to starve whilst out at sea.
<fluency>  Puffins, like many auks  feed on fish and zooplankton , and it is not known if man-made causes, such as over-fishing or climate change  have lowered the amount of food available to puffins, causing them to starve whilst out at sea.
 Puffins, like many auks feed on fish and zooplankton , and it is not known if man-made causes, such as over-fishing or climate change , have lowered the amount of food available to puffins, causing them to starve whilst out at sea.