2. Put a suet feeder out in winter. In the winter use a suet feeder to provide extra energy for cardinals and other birds. While this will probably not be the primary feeding choice of cardinals in your area, they may come to a suet feeder to find extra food in the winter.. Put a suet feeder out in winter. In the winter use a suet feeder to provide extra energy for cardinals and other birds. While this will probably not be the primary feeding choice of cardinals in your area, they may come to a suet feeder to find extra food in the winter.
A pilot experiment/study is often used to test the design of the full-scale experiment which then can be adjusted. It is a potentially valuable insight and should anything be missing in the pilot study it can be added to the full-scale (and more expensive) experiment to improve the chances of a clear outcome.
Cross-sectional studies involve data collected at a defined time. They are often used to assess the prevalence of acute or chronic conditions, or to answer questions about the causes of disease or the results of intervention. They may also be described as censuses.