Amateur bird enthusiasts (called birdwatchers, twitchers or, more commonly, birders) number in the millions. The area's natural scenic beauty and nature preserves attract photographers, birders and kayakers. It is attractive to canoeists and birders. They are also popular among birders and photographers. McHugh compared the DSM to a field guide used by amateur birders to identify birds. Another way birders view pelagic species is from seagoing vessels. Backyard birders attract it using feeders containing seeds, particularly sunflower seeds and safflower seeds. Some birders engage in competition to accumulate the longest species list. The vermilion flycatcher is a favorite with birders. Plum Island and its surrounding estuaries are a popular destination for birders. The film follows three seasoned birders who each set out to achieve a Big Year. Collecting the observations of everyday birders for scientific use is a hallmark of the Lab. This a nice spot for all birders within the city limits. However, in that era, most birders did not travel widely. In 2005, two British cycling birders decided to have a competition.