I decided to take my Jack Russel Terrier to a state park in Delaware located next to the famous C&D canal. Patch, a short haired Jack Russel had been confined to the indoors for most of the winter as he doesnt care for the cold. At the C&D canal there is nothing but thousands of acres of grassy open land boardered by forest. Birds of prey such as large hawks, bald eagles, brown eagles, & turkey vultures are always seen flying above gracefully gliding on the wind currents. Upon making my 1st stop, I let Patch go & the dog went ballistic. He was very happy & ran non stop investigating everything, & ofcoarse, leaving his urine mark. He was over 20' away when this brown eagle, whom I initially didnt see as I was focused on Patch came swooping down on him. The eagle had what looked like a wing span of about a yard across. He was what looked like within 3' of my dog but suddenly aborted his intended target. Patch weighs probably about 20lbs which Im sure would'nt be any problem for the predator. Perhaps he mistaked Patch for a rabbit, or possibly me yelling & waving my arms wildly detered his actions, I'll never really know. As the eagle flapped his wings to regain attitude, you could hear the birds powerful wings displace the air. Thats what suddenly alerted Patch to the all to real threat. I've seen similer actions like this on TV shows on nature topics, but to have it happen right in front of me, & to my beloved dog was both frightening, yet facinating. Upon realizing what was happening, Patch took off like a bat out of hell, but in all actuality, the bird had him in his sights & ultimatly would have snatched him up. I cannot help but to wonder if I scared the bird of prey off, or if it realized upon getting closer to my dog, that it was to large or simply wasnt worth the effort. I'll never know, but thankful "MY BUDDY" came out of it unscathed.