Previously, scientists thought these birds and another bird species, known as swift birds ... The birds, as if preprogrammed with a particular flight plan, make giant loops around the tropical ...

They even take their baths in flight by dipping in a water source ... You may hear the distinctive twittering call of a swift bird before you look up to see it flying above. Up to 35,000 Vaux ...

Local bird experts are calling for the preservation of the swift population in Northern Ireland. Bird groups have recorded a 66% reduction in breeding swifts across the UK in the last 30 years.