A Hungry 'Black line'

At a winter morning a ’black line’ was seen climbing up a distant leafless tree. The line was about ten feet length. On seeing through binoculars the black line turned out to be a snake! Yes, it was a Black Rat snake that was climbing up the tree to catch and devour the little birds that were perching on its branches! This Black Rat snake is an excellent climber. A climbing wonder!