In a bar chart, it is easier to compare the proportions in individual categories.
In a pie chart, it is easier to assess the combined proportion in adjacent categories. This is most useful when the categories are ordered or can be meaningfully grouped in some way.
Click on individual categories (on either the pie or bar chart) to read their proportions. Drag over adjacent categories to read the combined proportion.
- The bar chart shows...
- Fewer chickens were positively identified as killed by dogs than foxes.
- The pie chart shows...
- About two thirds of the chickens were killed by mammals (fox, dog, 'fox or
dog' and 'other mammal').
Data were collected in the east of France to assess the main predators of free-range
poultry. Typically the chickens are given free access to fields surrounding their
hen house for a period of 9-23 weeks, usually returning to the hen house at night.
The main predators are birds of prey (raptors), crows, foxes and dogs.
Although the predators were usually not sighted, the type of predator could
usually be inferred from the wounds on the chicken bodies and feathers, hair or
droppings around the bodies. The table below shows the numbers of birds that were
killed during the study.
Class |
Predator |
Frequency |
Percentage |
|
Fox
Dog
Fox or dog
Other mammal |
|
|
|
|
Bird of prey
Crow
Unknown
|
|
|
|
|
|
|
|
Total |
|
925 |
100 |