The Eastern Fields Bird and…

The Eastern Fields Bird and Bat study makes a critically flawed assumption. All information presented indicates an essentially static roosting, feeding, and breeding environment. Maps are r presented that indicate areas for the above. In point of fact these areas vary from year to year, month to month, and during peek migrations, day to day. The primary factor is the availability of water and feed. The study does not take this into account. A competent study would have noted that bird density varies with availability of feed, and water, and this is dictated by agricultural use of the land from the prior year. Agricultural use can and does change the availability of transitory water sources (essential during migration and spring breeding), and the type of feed available. At any point during the spring and fall migrations any field or other open area can be in use by migratory birds. Thus the maps presented represent a single fixed point in time and have no value in a subsequent year.