800-900 swans in 1736. Swan numbers have varied from 500-1200 over the last 10 years [in 1986].

Increases in dairy herds occurred during the >70=s and >80=s, which has led to slurry and, occasionally, silage entering the Fleet at times. Corn is now planted on the extreme edges of the Fleet. Pesticide and fertilisers are sprayed in the Herbury area in recent years.

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