Allen & Mellon Environmental is a limited company formed in 2004.


In 2004, Clive Mellon joined with Dave Allen who had set up an independent consultancy the previous year.  Originally the company focused on ornithological services, but the company soon developed its range of expertise to encompass a wide range of ecological surveys, management planning, training and environmental policy. For example, Allen and Mellon Environmental is now a recognised leader in the survey and study of lepidoptera (moths and butterflies).  We are based in Belfast but with our outpost in County Fermanagh we are well positioned to undertake projects in the NW cost-effectively.




Dave Allen
HND (Env. Science) MCIEEM

Dave Allen has over 35 years’ experience of working in the environment sector with particular expertise in habitat management, lepidoptera and ornithology. Dave studied Applied Ecology at Wolverhampton and went straight into contract work with RSPB in 1977. He moved to Northern Ireland in 1979 where he became a warden and then Reserves Manager for RSPB NI, before setting up as an independent consultant in 2003. He is a member of the moth record validation committees for both jurisdictions in Ireland and sits on the NI Marsh Fritillary Action Group. Dave is also a full member of the Chartered Institute of Ecology and Environmental Management (CIEEM).



Clive Mellon

Clive Mellon has over 30 years’ experience in the environment sector with a career involving roles at Ulster Wildlife Trust, National Trust and RSPB where he was the Conservation Manager for NI. A graduate in law from Queen's University Belfast he has a particular interest in environmental policy and legislation.  However he is also an experienced field naturalist with many years of experience in survey and monitoring including birds, mammals, habitats and lepidoptera. Clive is a full member of the Chartered Institute of Ecology and Environmental Management (CIEEM). He is also a member of the NI moth record validation committee and is currently Chair of the RSPB NI Committee.


The Team

Anna Hart
BA Hons. (Env. Science)
Ecological Assistant

Anna graduated from the University of Ulster with 1st class honours in 2014.  Since 2010 she has gained experience working with Allen and Mellon on a range of projects including bat and badger surveys, searching for marsh fritillary larval webs and GIS habitat mapping. Anna has developed a particular interest and expertise in invertebrates, leading in 2015 to her appointment as TCV’s Natural Talent Trainee in Entomology, based at CEDaR. In early 2016 she worked with NMNI on the Vertigo Pilot Study before re‐joining Allen and Mellon. She now divides her time between working with the company and representing Buglife as one of their NI officers in a job share arrangement.

Dennis Weir
Associate Ornithologist

Dennis is one of Ireland’s foremost field ornithologists, with extensive experience both here and abroad, extending over four decades. He has participated in many formal bird surveys including Breeding Bird Survey (BBS), Wetland Bird Survey (WeBS) and single species surveys. Whilst he is freelance, Dennis has supported Allen and Mellon Environmental with dedicated services over the past 9 years. He has worked on a range of projects including:

  • Ornithological work at 15 wind farm projects undertaking both breeding and wintering bird surveys in addition to raptor flight activity assessment.
  • Breeding Wader Surveys
  • Tern foraging movements at sea 2009 to 2014
  • Breeding Seabird Census

Dr. Roy Anderson
Ph.D., B.Sc. Hons
Associate Ecologist

Before retirement Roy was a professional soils chemist at the Agri‐Food and Biosciences Institute (AFBI) with a strong interest in biodiversity, ecology and climate change. He is an expert in a wide variety of taxa but notably Coleoptera, Mollusca, Diptera: Syrphidae and Fungi: Ascomycotina. He has published several books and many scientific papers on invertebrate and fungal taxonomy, ecology and biogeography. Roy has a vast knowledge of habitats and sites throughout Ireland and there are few corners of the country which he hasn’t visited. He has worked with Allen & Mellon on many projects including Common Standards Monitoring of Invertebrate Assemblages on ASSIs (NIEA), biodiversity audits and invertebrate surveys of under‐recorded parts of Ireland (The Heritage Council).