The BBC hopes 100,000 people will take part

The BBC and Woodland Trust are running the Springwatch project to see how nature is responding to global warming.

A nationwide network of volunteers is being asked to record their first sightings of six species - including bees and butterflies - this spring.

The survey results will be revealed in a new BBC Two series, Springwatch with Bill Oddie, later in the year.

Springwatch is one of the biggest public nature projects undertaken in the UK.

Climate change

Participants, who do not need to be wildlife experts, are being asked to record when and where they first see bumblebees, frog spawn, swifts, Peacock butterflies, seven-spot ladybirds and flowering hawthorn.

Scientists know that certain species, especially types of insect, make their first appearance of the year earlier than they did 30 years ago.

But each species reacts differently to the warmer weather and researchers want to understand how their habits differ to discover the overall impact of climate change.

The new data will be sent to researchers via the Springwatch website.