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.
A longitudinal study and a cross-sectional study are methods of collecting scientific data.A longitudinal study is the method that gathers data on a subject for a particular period of time and the subject's response to particular variables.A cross-sectional study is where more than one subject is used for the collection of data at different points in time in response to particular variables.These types of studies are sometimes used to determine correlation. longitudinal study and a cross-sectional study are methods of collecting scientific data.