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A "duck" is a bird that goes on water (for example, a duck, goose, seagull or moorhen). There are many types and varieties of duck, all of which should be counted. Birds such as pigeons, which do not go on water, are not "ducks".
A "rood" is an area defined as 1 rod by 1 furlong and is approximatly 1011m2. One rod is defined as the combined length of the left feet of the first 16 men out of church on one Sunday morning and is 5.5 yards. One furlong is 40 rods.
Water Resource:
A univeristy's "water resource" could be comprised of, for example, a lake on or near the campus or site, or a sensible stretch of river running through or near university land. Coastal universities with land close to the sea should include the area of water ½ a furlong out from a suitable stretch of coastline. Multiple rivers or lakes which fit this definition should be considered as a single "water resource". Universities which have no suitable "water resource" cannot have any "ducks" using this resource, and therefore have a "Duck Density" of zero.
Duck Catchment Area:
"Ducks" may be counted within a "catchment area" surrounding and including the "water resource". The size of this "catchment area" should be determined by the maximum distance from the "water resource" at which ducks using the "water resource" can generally be found.
Duck Encouragement:
Ducks should be counted in their regular habitat. Photos of particularly high "Duck Density" can be achieved using "Duck Encouragement". "Duck Encouragement" generally consists of either "bread" or "fish & chips". "Duck Encouragement" should not be used to artifically increase the number of ducks using the "water resource".

Top 5 universities

UniversityDuck Density
East Anglia2.8

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