Is the red part natural English? Does it mean 'there is nothing to fear'?

As summer draws to a close, you may stumble across a tired, sleepy or (apparently) dying bee – but not to fear as you can help revive it.




It's a bit of an unusual construction, but it means the same as the more common 'but not to worry'.

In other words, 'don't worry'. You may think there's a problem with the bee, but don't worry, you can sort it out.