Overall breeding bird populations in England have changed little compared with 40 years ago. In 2010 they were just above what they were in 1970, following a small decline of...

Index of the UK population of wild birds - Individual species indices

Spawning stock biomass (SSB) is the total weight of all sexually mature fish in a population. Spawning stock biomass index (1964=100(mackerel 1980=100))

Spawning stock biomass (SSB) is the total weight of all sexually mature fish in a population. Four of the five measured species have shown a small increase in adult biomass in...

population of wild birds - wintering waterbirds: 1975/76 to 2007/08

Overall breeding bird populations in the UK have changed little compared with 40 years ago. In 2010 they were 4.4 per cent higher than they were in 1970, following a small...

Trends in populations of selected bat species

Trends in populations of selected butterfly species

Trends in populations of selected species (wild birds)