The parts of this film of a Little Egret Egretta garzetta fishing in which discarded drinks cans appear could very easily have been edited out, providing a rather sanitised and more idyllic representation of the scene being filmed but the reality is that there will always be evidence of malicious human behaviour visible somewhere when one is recording the activities of wildlife. One example is of course the use of non-biodegradable black plastic bags to collect dog-waste that are then mystifyingly thrown into vegetation rather than being properly disposed of. Another is the fly-tipping of dangerous materials (freeon refrigerants or uncontained asbestos for example) either on land or into river systems. These are utterly deplorable activities and many will share the view that those found to be responsible for bio-hazardous fly-tipping should face robust deterrents in the form of custodial sentences or very substantial fines. Quite why the selfish individuals responsible for discarding these cans cannot bring themselves to carry their litter a short distance and place it into one of the litter-bins provided remains one of life's mysteries and consequentially the sites are degraded for other humans and wildlife alike. It is difficult to understand why the culprits even bother to visit parks or woodlands that are enjoyed by the majority of visitors at all if they cannot contrive to do so without causing deliberate damage to the environment. This river system contains fish species associated with clean chalk streams so these are particularly vulnerable to pollution.