Hobson's Conduit Trust

Bioblitz 2024

FRIDAY 14th JUNE 5.45 pm – 11pm

SATURDAY 15th JUNE 8.00am – 1pm

By kind permission of St Mary’s school, Cambridge.

To be held at the Brookside garden of St Mary’s School CB2 1JE, with cycle access via Brookside:

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Families welcome!

(All under 16 year olds to be accompanied)

Timetabled events led by enthusiastic experts including small mammal identification, bat detection, moth trapping, bird spotting, butterfly identification, plant identification, examining freshwater invertebrates, guided walks along Hobson’s Brook and Conduit.

Register on the day. All activities free of charge. Organised by Hobson’s Conduit Trust.

This year the Trustees of Hobson’s Conduit thank St Mary’s School for their kind permission to base our sixth annual Bioblitz in their Brookside garden.

In 2023 our Hobson’s Brook Bioblitz was held at Emmanuel College’s Darien Meadow, Long Road, Cambridge. Darien Meadow lies between Hobson’s Brook and the railway.

A dozen experts and volunteers ran hour-long identification sessions and guided walks at the site. The Bioblitz sessions covered plants, small mammals, birds, bats, moths, other insects and freshwater invertebrates.

180 different taxa were found (mostly identified to species level). These included:

  • 28 species of birds
  • 6 mammals
  • 3 fish
  • 1 amphibian
  • 85 types of invertebrates (including 17 moths), and
  • 57 different plant species.


Bioblitz highlights were the Blackcap, Buzzard and Kestrel, the Common Blue Damselfly and Speckled Wood Butterfly, the Soprano Pipistrelle Bat, the Bank Vole, the Small Grass Shieldbug, and theGlaucous Sedge.

These results are comparable with previous Bioblitzes: 2022 at Clare College’s North Paddock, 2019 at Clare Sports Ground, 2018 at Hobson’s Park, Trumpington and 2017 at Nine Wells and Empty Common.

Together they capture the diversity of habitats along the Hobson’s Brook Corridor.This year we will focus on the Brookside gardens, the Conduit along the Botanic Garden frontage, New Bit and Vicar’s Brook.

On Friday early evening and on Saturday morning Trustees will conduct guided walks along Hobson’s Brook and Conduit.

Friday evening 14th June


Trustee Guided Walks6pm onwards
Bird spotting6 – 7pm
Small Mammals7 – 8pm
Bat Detection9 – 10:30pm
Moth trapping10:30 – 11pm
Saturday morning 15th June
Small Mammals 8-9am and until 1pm
Moth Trapping 9 – 10am
Trustee Guided Walks 9:30am onwards
Bird spotting 9.30 – 10.30am
Butterflies 10 – 11am
Plant identification 11am – 12 noon
Freshwater invertebrates 12 noon – 1pm

Our programme of Bioblitz events has highlighted the biodiversity of green spaces close to the built environment, and shows the importance of the Hobson’s Brook ‘green corridor’ in preserving wildlife in the City of Cambridge. Maintaining a strong flow of high quality water in Hobson’s Brook is clearly essential for the continued success of these ecosystems, which offer considerable benefits to the people that live close by.

The Hobson’s Brook corridor forms part of the Cambridge Nature Network.