Brandon Marsh is a Site of Special Scientific Interest (SSSI) and nature reserve in Warwickshire, England.

[2][3] Today, Brandon Marsh is a mixture of flooded gravel pits, fen, scrubland, reedbeds and woodland, much of which is uncommon habitat for the local area.

The flora and fauna is extremely varied due to the numerous types of habitat, and includes many species that are otherwise rare in the area.

Large numbers of bird species are resident or passage migrants here, including many ducks, geese and waders.

[10] Plant life varies throughout the reserve depending on the habitat, and notable species are mentioned in the relevant sections.

[13] Willow Island is much larger and more grassy, providing suitable areas for lapwing, common redshank and green sandpiper.

An artificial structure alongside the pool is designed to attract sand martins to breed, as they did when the gravel quarry was operational; this was successful for the first time in 2009, with eight nestholes occupied and over 40 young fledged.

This project is part of the UK Biodiversity Action Plan which has targeted the creation of 1,200 hectares (3,000 acres) of reedbed nationwide.

The area is managed for biodiversity purposes and provides habitat for numerous mammals, including muntjac, as well as woodland bird species.

[7] Brandon Marsh has a very low risk of pollution[19] and as such the main threat from man has been from vandalism; in 2007, a fire started by youths destroyed a third of the Newlands reedbed.

[20] This was the second time the reed bed had been targeted, the previous attack seven years earlier having occurred shortly after threats were made by animal rights activists protesting against a cull of ruddy duck.

A perennial problem is the invasive Japanese knotweed, which shades out local plant species with its dense growth.

Removing it is time-consuming as the herbicide used to control it has to be injected straight into the root system, to prevent it reaching other flora.

Mink are a serious threat to ground-nesting birds, and since they are strong swimmers, the nests on the East Marsh islands are vulnerable to them.