This study involves observing the number of other birds in an area where ravens are present. The common raven, scientifically known as Corcus corax, is a stocky and entirely black bird that lives among humans. These birds have adapted to the world development and have created new habitats. From the background study on these birds, it is clear that they usually prey on smaller bird species and shrike nests of other birds. Their predation risk increases mostly during the time when they are feeding their young ones. San Mateo County provided the ideal location for this survey. Many birds inhabit this County. The hypothesis of the survey is that the higher the number of ravens in an area the lower the number of other birds present. Before the beginning of the survey, I made a simple prediction that the population of other birds would be low in the areas where ravens were present.
The activities involved identification of a suitable location for the survey. The survey took place in different locations so as to get different results. The identification of the area of survey utilized the transect line method. The survey took place on different random days over a period of forty three days. All transects’ survey took place in a different order each day. This was important to ensure observation of birds during different times of the day. Counting of the birds included the ravens as well as other birds in the area. The data excluded large soaring birds. The records also included the general cover of the area and the weather during the survey. Records included all interesting observations of bird behavior. Field note books served the purpose of noting all events as they occurred. Recording the different weather conditions proved important so as to analyze whether it has any effect on the birds’ activities. The survey also included trying to avoid as much as possible not to count one individual...