Belongs to: trees

Oak Quercus robur

Also known as: pedunculate oak, sessile oak

Best time to see: all year

Key facts

A spreading tree, growing to a great size (up to 45m) and age (500 years or more), with rugged grey-brown bark

Acorns, like an egg in a cup, are attached by long stalks on the pedunculate oak and on the sessile oak by very short ones

Leaves are dark green with wavy lobes


Most oaks in Essex are pedunculate, the sessile oak preferring the lighter soils further west or north

Supports a very large number and variety of insects, in turn providing food for many birds and other creatures

  • Main photo
  • seed & galls

Photo © Tony Gunton

Photo © Steve Prewer