Thresher shark
The thresher shark is a migratory species and passes through UK waters in the summer months. If you’re lucky, you might see this magnificent shark jump high out of the water in to the air.
Thrift
Cushions of clover-like, pink Thrift are a familiar sight of cliffs, shingle beaches and sand dunes around the UK. Also known as 'Cliff Clover', it makes a good garden plant.
Timothy
Timothy is a grass of meadows, arable land, waste ground and roadside verges. It is also cultivated as fodder for livestock. Look for slender stems and long, cylindrical flower spikes in summer.
Toadflax-leaved St John's-wort
Toadflax-leaved St John's-wort has star-shaped, bright yellow flowers. It is a rare plant, with most of its population existing on Dartmoor. It likes steep, sunny slopes, acidic soils and plenty of space.
Tompot blenny
This clown-like fish is a favourite amongst divers and snorkellers. They are inquisitive little souls and will investigate divers near their hidey-hole homes.
Tope shark
This slender and elegant shark species is often found close to shore all around our coasts and can grow up to 6 feet long.
Tormentil
Tormentil can be found growing on acid grassland, heathland and moorland, but even pops up alongside roads. It bears yellow, buttercup-like flowers, but with only four petals (buttercups have five).
Traveller's-joy
The fluffy, white seed heads of Traveller's-joy give it the evocative, alternative names of 'Old Man's Beard' and 'Father Christmas'. A clematis-like climber, it can be seen scrabbling over hedgerows and in woods.
Tree bumblebee
The Tree bumblebee is a new arrival to the UK. First recorded here in 2001, it is slowly spreading north. It prefers open woodland and garden habitats and can be found nesting in bird boxes and roof spaces.
Tree pipit
This streaky brown bird is a summer visitor to Britain, favouring open woodlands in the north and west.
Tree sparrow
A scarce and declining bird, the tree sparrow can be spotted on farmland and in woodlands; it is not an urban bird in the UK. It has a brown cap and black cheek-spots, unlike the similar house sparrow.
Treecreeper
The fine, downcurved bill of the treecreeper makes this tit-sized bird unmistakeable. Look out for it in woodlands and parks, literally 'creeping' around tree trunks.