Spectacular murmurations of starlings are once again thrilling nature lovers visiting Netherfield Lagoons.
Tens of thousands of birds have been swooping and diving in unison in the skies above the popular nature reserve this week.
Their wheeling aerial displays have been taking place at dusk before they roost for the night.
The video showing their display was captured by Mark Glover who is chair of the Gedling Conservation Trust, the group who manage the Lagoons.
What is a murmuration of starlings?
Murmurations are huge groups of starlings that twist, turn, swoop and swirl across the sky in beautiful shape-shifting clouds.
Just before dusk, small groups of starlings from the same area come together above a communal roosting site. The group grows ever larger, moving in unison in an aerial dance that casts gorgeous shapes against the waning daylight.
It is believed murmurations of starlings form for several reasons.
Grouping together offers safety in numbers as predators, such as peregrine falcons, find it hard to target one bird in the middle of a hypnotising flock of thousands.
They also gather to keep warm at night and to exchange information, such as good feeding areas.
The number of starlings in a roost can swell to around 100,000 in some places.