Yellow Wagtail is another species to look out for in August. While it has disappeared as a breeding species in many areas of the UK, on autumn migration there is a good chance of finding it anywhere ...

The blog focuses on a range of topics, including BTO’s scientific work, BTO Youth programmes of work, and opinion pieces. Sometimes they include interviews with other people, or are written by a ...

Read the latest updates from our Cuckoos on their epic migration between the UK and tropical Africa, or track their movements in real-time on our Cuckoo migration map. If you enjoy these updates, ...

Obtaining measures of population size and fitness are key first steps to understanding how and why species' populations change over time. Quantifying such metrics is difficult in some species, however ...

Bennett, S. & Weston, E. 2025. Growth of seaweed species on GLS logger attachments. Seabird 37: doi:10.61350/sbj.37.3 The authors thank the UK Centre for Ecology & Hydrology for facilitating the ...

Why are we conducting the Winter Bird Survey? The Winter Bird Survey will: Help us understand how wintering birds benefit from using agri-environment scheme and agri-environment and climate scheme ...

To evaluate (1) whether three migratory nightjar species (Family Caprimulgidae) adhere to Bergmann’s rule, (2) whether environmental factors on the breeding or wintering grounds determine body size, ...

Get to know your square Your Regional Organiser will give you the grid reference of your 1-km Winter Bird Survey square. To find the location of your square: Visit the Ordnance Survey website Enter ...

About the surveyThe Winter Bird Survey is a UK-wide repeat of the 2018/19 English Winter Bird Survey. Like its forerunner, the Winter Bird Survey covers a single season, collecting important ...

Estimates of breeding seabird populations are used to assess the potential impacts of proposed wind farm developments. The approach used in these assessments is known as the Biologically Defined ...

Climate change and the alteration of land-use and land-cover (LULC) on a global scale presents a notable threat to biodiversity, with a particular impact on long-distance migratory birds. Nonetheless, ...

Following a meeting of more than 100 experts, a report into the continuing Highly Pathogenic Avian Influenza (HPAI or ‘bird flu’) outbreak has been published by the British Trust for Ornithology (BTO) ...