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Author: Les Underhill

Prof Les Underhill was Director of the Animal Demography Unit (ADU) at the University of Cape Town from its start in 1991 until he retired. Although citizen science in biology is Les’s passion, his academic background is in mathematical statistics. He was awarded his PhD in abstract multivariate analyses in 1973 at UCT and what he likes to say about his PhD is that he solved a problem that no one has ever had. He soon grasped that this was not the field to which he wanted to devote his life, so he retrained himself as an applied statistician, solving real-world problems.
Archive/Biodiversity/Bird ringing/Birding/Birds/Citizen Science/Site report/Vanrhynsdorp

Bird ringing at Botuin, Vanrhynsdorp : 29 March to 4 April 2025

Posted on 13/07/2025 by Les Underhill

We had neglected our Vanrhynsdorp ringing sites since November last year, so this visit was overdue! You can read the report on that trip here. This blog summar...

Archive/Biodiversity Observations/Site report

Researcher heaven : publications on biodiversity on Robben Island

Posted on 01/07/2025 by Les Underhill

Imagine. You are a new postgraduate student on Robben Island. You know you have lots of predecessors, and that you need to read up on all the research has alrea...

Archive/Biodiversity/Bird ringing/Birding/Birds/Citizen Science/Karoo

Bird ringing course at New Holme : 9 to 15 September 2024

Posted on 01/07/2025 by Les Underhill

The BDI’s ninth bird ringing course, and the fourth at New Holme, was held at the New Holme Nature Lodge, in the heart of the Karoo, between Hanover and C...

male southern red bishop
Archive/Bird ringing/Birding/Birds/Vanrhynsdorp

Bird ringing course at Botuin, Vanrhynsdorp : 15 to 20 November 2024

Posted on 30/06/2025 by Les Underhill

The BDI’s 10th bird ringing course was held at Botuin, Vanrhynsdorp, from 15 to 20 November 2024. We have a selection of ringing sites in the district, wh...

Archive/Biodiversity/Bird ringing/Birding/Birds/Citizen Science/Trip report

Bird ringing at Nuwejaars Wetlands SMA : 7 to 11 April 2025

Posted on 06/06/2025 by Les Underhill

Expedition number five to the Nuwejaars Wetlands SMA. Our accommodation was in the delightful units at Hazevlakte. We arrived Monday 7 April, put up nets in the...

Sunrise at Moddervlei - bird ringing at nuwejaars wetlands sma 30 May-4 June 2025
Archive/Bird ringing/Birding/Birds/Citizen Science/Trip report

Bird ringing at Nuwejaars Wetlands SMA : 30 May to 4 June 2025

Posted on 05/06/2025 by Les Underhill

We had another exploratory ringing expedition to the Nuwejaars Wetlands Special Management Area (SMA) from Friday 30 May to Wednesday 4 June. This is the BDI...

Archive/Bird ringing/Birding/Birds

Bird ringing at Vondeling : 17 to 19 September 2024

Posted on 29/09/2024 by Les Underhill

The BDI did a bird ringing demonstration at Vondeling Wine Farm. We were invited to show how bird ringing works to the Onderstepoort Veterinary Class of 1984. T...

Archive/Biodiversity/Birding/Birds/Citizen Science/Karoo/Site report/Trip report

Tankwa Karoo National Park with the SANParks Honorary Rangers

Posted on 28/09/2024 by Les Underhill

It was both an opportunity and a privilege when the Boland Region of the SANParks Honorary Rangers invited me to join them at their annual event at the Tankwa K...

Archive/Birding/Birds/Industrial biodiversity

Industrial biodiversity 3 : an hour spent replacing tyres in Maitland

Posted on 06/09/2024 by Les Underhill

Birds succeed in making a living in pretty hard circumstances. This includes the jungles of tar, concrete, wires with assorted purposes strung between poles, wi...

Blue Cranes and orange daisies. Flowers and feathers
Archive/Bird ringing/Birding/BirdPix/Birds/Citizen Science/Trip report/Vanrhynsdorp/Virtual Museum

Flowers and feathers: Vanrhynsdorp : 4 to 7 August 2024

Posted on 11/08/2024 by Les Underhill

We visited Botuin Cottages between 4 and 7 August to enjoy the spring flowers and do some birding and ringing. Flowers and feathers. It was also a test run to e...

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  • Home
  • Departments
    • Research Training
      • Introduction
      • Research Themes
      • Study Sites
      • Logistics
    • Bird Ringing
      • Introduction
      • Ringing history
      • The Value of Bird Ringing
    • Science and Ecology Specialist Consulting
    • Citizen Science – Biodiversity Conservation & Research
    • Biodiversity Observations
  • About
    • What we do
    • Who we are
    • Contact us
  • News
    • Archive
    • BDI Research
    • BDI Bridge
    • BDInsight
  • Upcoming BDI events
  • Biodiversity Projects
    • Bird Feeder Project
    • Atlas of Frogs & Toads
    • Atlas of African Neuroptera and Megaloptera
    • Atlas of Dragonflies & Damselflies
    • Atlas of Butterflies & Moths
  • Karoo Research Centre

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The Biodiversity & Development Institute is a non-profit company registered with the Companies and Intellectual Property Commission of South Africa (CIPC), Reg. No. 2015/136344/08.
Registration in terms of the Non-Profit Organisations Act: 302-671 NPO.


Directors:
Prof Les Underhill, Ms Sue Gie, Jorn Das
les@thebdi.org
072 062 1140


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