<http://schema.org/alternativeHeadline>
"The pine marten is the red squirrel's natural predator, but researchers have shown that it is also the squirrel's best ally in areas that have been taken over by invasive grey squirrels."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/blogs/this-predator-is-an-unlikely-ally-for-declining-red-squirrels>