A world inspired by birds and informed by science.
Making birdwatching countWe empower 60,000 bird-enthusiasts to gather vital data, develop their skills and be part of a vibrant community.
Championing impartial scienceWe answer the most pressing questions about birds, through our thorough and impartial scientific research.
Sharing our bird knowledgeWe communicate our knowledge and expertise to increase the value of birds and other wildlife for all.
Open access atlases
BTO has been working with volunteer-sourced atlas data for many decades. Now we are taking the bold step of making the full archive of distribution data freely available for anyone to use.
Associations between gamebird releases and general predators
Pheasants and Red-legged Partridges for commercial shoots may be boosting numbers of the avian predators and scavengers.
Become a member before summer ends
Join BTO before 23 September and enjoy 12 months of membership for the price of 9.
Updated biodiversity indicators
BTO monitoring data has contributed to the updated set of 24 goverment Biodiversity Indicators for 2019.
Population growth rates affected by climatic variables
Research by BTO and Natural England, suggests that climate change has had a detectable impact on a sizeable proportion of England’s avifauna over the last 50 years.