The smock mill Goliath in front of the wind farm Growind in Eemshaven in the Netherlands. A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades. Centuries ago, windmills usually were used to mill grain (gristmills), pump water (windpumps), or both.
When bat guano is harvested, it is in a powdered form. Plants that can benefit from the use of bat guano fertilizer include vegetables, herbs, ornamentals, and fruit and nut trees.
With bat boxes, the bats get a safe roosting site outside the home, while homeowners benefit from the bats' control of insects. Figures 5 and 6 show two plans for building a bat house. A handsaw, hammer and staple gun are the only tools required for the beginner's bat house (Figure 5).