Look out for the small, yellow flowers of Celery-leaved buttercup in wet meadows and at the edges of ponds and ditches. It flowers from May to September.

An attractive, olive-green bird, the greenfinch regularly visits birdtables and feeders in gardens. Look for a bright flash of yellow on its wings as it flies.

The whooper swan is a very rare breeding bird in the UK, but has much larger populations that spend winter here after a long journey from Iceland. It has more yellow on its yellow-and-black bill…

This purply-brown seaweed is a common feature on our rocky shores and on our dinner plates.

In summer, the 'frothy' flowers of lady's bedstraw can carpet the grasses of meadows, heaths and coasts with yellow and fill the air with a sweet, honey-like scent.

Pineappleweed is an introduced species that has become a widespread 'weed' of disturbed ground, such as pavements and roadsides and gardens. It has feathery leaves and yellow flower…

Look for the wood warbler singing from the canopy of oak woodlands in the north and west of the UK. Green above, it has a distinctive, bright yellow throat and eyestripe.

Looking a bit like a ragged version of a dandelion, mouse-ear hawkweed has lemon-yellow flower heads that are tinged with red at their outer edges. It likes grassy places with short turf and…