There has been records of adults with young at Moore Nature Reserve. Typically BNG colonies are associated with nesting black-headed gulls, which must give some measure of protection from aerial predators.
There are just 55 breeding pairs in Britain, with around 120 individuals here in the winter months. Whilst numbers here in Britain are limited, the black-necked grebe is the most abundant grebe in the world, with many of these residing in North America.
BNG favoured habitat is shallow, eutrophic waters, usually with extensive vegetation along the fringes and often floating aquatic plants, and a site preferably sheltered from strong winds. This flash appears suitable albeit without any nesting gulls.