slope planting with bird houses

I can be seen toward the center of the picture planting willow cuttings on the steep and rapidly eroding slope. I installed numerous bird houses to replace the nesting opportunities that had disappeared with the removal of the trees. Birds distribute the seeds of their food plants via their droppings, which also contain nutrients essential to plant growth such as nitrogen and phosphorous. This 'seed rain' augmented my initial plantings facilitating a much quicker regeneration of the vegetation.