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back and the young ones rush forward to quickly consume what has been uncovered.
When the ground is covered by snow, the double, scratch is most effective in, uncovering seed. This is when white-throated Sparrows, make the most use of thendouble scratching. Not only does the scratcher benefit, but other birds profit by the effort.Apparently
the ability to use this distinctive method of finding food is inherited; thus, genetic. Cardinals and Blue Jays don’t scratch but are constantly in the presence of birds that do. They can easily observe the effectiveness of the method but do not learn to do it themselves.
I have frequently observed a jay sweeping aside snow, with its bill which is used like' a broom. After the heavy snow of 1996, jays did this frequently on our platform. Other bird's quickly rushed in to take, advantage after the jay flew off.
Birds not only uncover hidden seed when they scratchThe double scratch is mightly effective in quickly uncovering insects. With the first jump, the insect is alerted. The second causes it to scurry away, or attempt to do so. This when the scratcher sees and quickly consumes the critter.
There is much more to feeder watching than observing and looking for new species. I find the doublescratch particularly satisfying to watch. When the Whitethroated Sparrow decides to indulge in this inherited trait on the feeder, he sends seed flying in all directions. Much of it lands on the ground. In that case, other ground feeding birds enjoy the new food supply. It is all part of a good show.
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