Latest Research

Tagged Lesser black-backed Gull

GPS tracks and cutting edge stats shed new light on seabird flight heights

New research led by the BTO has used a combination of GPS-tracking and advanced statistics to provide new insights into seabird flight heights by night and day. This study gives important information on the risk of seabirds colliding with offshore wind turbines and at a time when governments worldwide are investing in offshore wind farms.
Cuckoo by Edmund Fellowes

Cuckoo declines linked to different migration routes to Africa

When the BTO began ground-breaking Cuckoo tracking research in 2011, we had very little idea where these birds spent the winter or how they got there. Our latest research not only reveals this information, but also shows that Cuckoos’ use of autumn migration routes helps explain population declines.

Willow Warbler, photograph by Jill Pakenham

Causes and consequences of spatial variation in Willow Warbler sex ratios

New BTO research shows a recent imbalance in Willow Warbler sex ratios, with 60% of adult birds being male. Such a skewed ratio has implications for the conservation of this migrant species.

Wren by John Harding

Northern Wrens weather the winter better than southerners

New BTO research reveals that one of our most widespread songbirds – the Wren – varies in its resilience to winter weather, depending on where in Britain it lives. Scottish Wrens are larger than those living in southern Britain, and are more resilient to hard winter frosts.

Little Owl, photograph by John Harding

Monitoring Little Owls with playback

Little Owls are in decline in the UK, but are hard to monitor, making it difficult to establish this species' conservation and management needs. Newly-published research by the BTO demonstrates how playback could be an effective tool for helping to detect and monitor this species.