Those Church lands are a linch pin in the natural migratory path of bison seeking winter range. (dotearth.blogs.nytimes.com)
It also lies along the main migratory path for birds migrating between North and Central America making this area a bird lover's paradise. (caravan.com)
Though they expected closely related birds to perform similarly — proving that the ability to follow a straight migratory path is inherited — they found no evidence of this. (newscientist.com)