The line graph below shows the number of birds of different types sighted at Bharatpur Bird Sanctuary between 2001 and 2014. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The line graph illustrates the number of three species of birds—kingfisher, black beak pelican, and flamingo—at Bradford Bird Sanctuary over a 13-year period from 2001 to 2014. Overall, the number of birds steadily underwent an upward trend for all species, except for the black beak pelican, which fluctuated but remained the second most numerous species […]