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Consequently, if direct aggression is a factor in the decline of Reds, it is certainly not considered to be the primary one.
Greys Out-Competing Reds This concept has two avenues: greys out-breeding reds; and greys being better adapted to surviving in deciduous woodland than Reds, which consequently leads to them monopolizing resources (i.e. The suggestion that Greys may out-breed Reds -- in other words, produce more young per season and thus force Reds out by increasing their own population size -- isn’t borne out by the data we have from the field.
Indeed, between 19 there was a dramatic decline in the number of Reds in Britain – so noticeable was the decrease that hunting had been suspended in the New Forest by 1927.
Further declines were recorded between 19, which were attributed to the timber demands imposed on the country during the World Wars and a number of exceptionally cold winters.
Conventionally, the idea that Grey squirrels may out-compete Reds has maintained a large following.
Various authors have presented data showing how the Grey squirrel is better adapted to a life in deciduous stands than the Red.
In truth, there is a somewhat smaller school who consider the decline of the Red squirrel may have more to do with some poor choices in respect to our management of their habitat than the introduction of the Grey squirrel, although this is not as widely accepted as the aforementioned theories.