Buff-tip moth
It is so easy to miss this clever little moth. It is a master of disguise, blending in perfectly as it looks just like the twig of a birch tree! Flying only at night, the buff-tip moth can be seen from May to July.
Bugle
Often found carpeting damp grassland and woodland clearings, the blue flower spikes of bugle are very recognisable. A short, creeping plant, it spreads using runners.
Bulbous buttercup
The bulbous buttercup has the familiar butter-yellow flowers of its namesake, but grows from a bulb-like 'corm' (a swollen underground stem). Look for it on chalk and limestone grasslands, and along verges.
Bullfinch
The rose-red breast, large black cap and thick bill make the bullfinch easy to identify. A plump-looking bird of woodlands, hedgerows and orchards, it also frequents gardens.
Bullhead
Living up to its name, the bullhead has a characteristically large, flattened head and a tapering body. Look out for it in fast-flowing, stony rivers and streams.
Bumblebee mimic hoverfly
This furry hoverfly does an impressive job of impersonating a bee.
Burnet companion
This day-flying moth is found on flowery meadows, often in the company of other moths and butterflies.
Bush vetch
A scrambling plant, Bush vetch has lilac-blue flowers. It is a member of the pea family and can be seen along woodland edges and roadside verges, and on scrubland and grassland.
Butterfish
The slippery butterfish is a common sight in rockpools all around the UK. Look out for the distinctive black spots on their backs that look a lot like eyes!
Buzzard
Listen out for the cat-like, 'kee-yaa' calls of the buzzard as it soars high over farmland and woodland. Once suffering from severe persecution and pesticide poisoning, it has made a stunning comeback to most of the UK.
By-the-wind-sailor
These mysterious and beautiful creatures rely on warm ocean currents to ‘sail’ them around the world... not a bad life?
Caddisfly
Caddisflies are a large order of insects that can be found in all kinds of wetlands. The larvae are known for making cases to pupate in, gathering stones, sand and leaves, and wrapping them with silk.