https://www.facebook.com/paul.howard.9461/videos/2522897677724254/ Todays NIPA liberation from Tullamore, birds already splitting into groups due to the staggered liberation from both sides of the transporter.
The staggered release from the transporter can cause the birds to split into batches, especially if there is a large amount of birds being liberated and being released from both sides of the Lorry.