Wedage, Irushinie R., Muthunayake, T. And Dayawansa P. N., (2010) Stakeholders, management problems and prospectus for collaborative management of Maduru Oya National Park. Proceedings of the 29th Annual session of Biology, Sri Lanka.
Dayawansa, P. N. and Siyam, S. M. (2002) Ranging behaviour of two sympatric species of frogs in the Sinharaja Man and Biosphere Reserve, Sri Lanka determined by radio-tracking. Annual ATB Conference, Tropical Forests: Past, Present, Future, The Association for Tropical Biology, Smithsonian Tropical Research Institute, Panama.
Ranukkanda K., Shalitha H. Karunarathne and Dayawansa P. N. (2018) Study of the Ranging behaviour pattern of two male elephants of the Sinharaja World Heritage Forest with reference to human-elephant conflict: 23rd International Forestry and Environment Symposium
Karawita H, Perera P, Gunawardane P, Dayawansa N (2018) Habitat preference and den characterization of Indian Pangolin (Manis crassicaudata) in a tropical lowland forested landscape of southwest Sri Lanka. PLoS ONE 13(11): e0206082. https://doi.org/10.1371/journal.pone.0206082
Dayawansa, P. N., Nadaraja D., Wedage, I. R., Muthunayake T., Lelwala D. S., Ratnaweera. P., Keeragala N. and Kotagama S. W. (2018) A perspective on management of House crow (Corvus splendens) in the City of Colombo: 23rd International Forestry and Environment Symposium
Perera, S. Wijesinghe, N. Dayawansa, S. Marasinghe and C. Wickramarachchi (2017) Response of tropical birds to habitat modifications in fragmented forest patches: A case from a tropical lowland rainforest in south-west Sri Lanka, Community Ecology Vol. 18 No. 2, 175-183
Dayawansa P. N. (2017) Kota’s Nature: A tribute to a great environmentalist Department of Zoology and Environment Sciences ISBN 978-955-41408-7-5
Karawita K. V. D. H. R., Perera P. K. P. and Dayawansa P. N. (2017) Habitat selection and burrow characterization of Indian Pangolin (Manis crassicaudata) in a tropical lowland rainforest habitat in South West Sri Lanka, Wildlanka International Symposium Proceedings ISSN 2465-5619
Dayawansa P. N. (2017) A review on avifaunal research in Sri Lanka, Annual Bird Watchers Conference, 2017 Field Ornithology Group of Sri Lanka.
Alwis N., Perera P. K. P. and Dayawansa P. N. (2016) The Response of Tropical Avifauna to Visitor Recreational Disturbances: A Case from the Sinharaja World Heritage Forest, Sri Lanka Journal of Avifaunal Research Vol. 3 (3)
Alwis N., Perera P. K. P. and Dayawansa P. N. (2016) The Response of Tropical Avifauna to Visitor Recreational Disturbances: A Case from the Sinharaja World Heritage Forest, Sri Lanka Journal of Avifaunal Research Vol. 3 No. 3
Dayawansa P. N. (2016) Bula Bebe- A beginners Guide to the Butterfly Watching in Fiji. Fiji National University ISBN 978-955-41801-5-1
http://www.fnu.ac.fj/new/media/com_acymailing/upload/fnu_newsletter_vol_8_no_20_19_may_2016.pdf
Dayawansa P. N. (2016) A Pocket Guide to the Butterflies of Fiji. Author Publication. ISBN 978-955-41801-5-2
http://www.fnu.ac.fj/new/2-uncategorised/1394-book-on-unique-role-of-butterflies
Marasinghe, S. S., Perera, P. K. P. and Dayawansa P. N. (2015) Composition and Functional diversity of the avifaunal community at an urban landfill in Colombo district. Proceedings of 20th International Forestry and Environmental Symposium 2015 Sri Lanka.
Jayarathne, C, Perera P. K. P. and Dayawansa P. N. (2015) A Preliminary study of behaviour of Rusty Spotted cat Prionailurus rubiginosus in captivity Wildlanka Vol. 3 (1) pp 1-11
Pabasara, M. , Perera, P and Dayawansa P. N (2015) A preliminary investigation of the habitat selection of Indian Pangolin (Manis crassicaudata) in a tropical lowland forest in the South West of Sri Lanka. Proceedings of the 20th International Forestry and Environmental Syamposium 2015 Sri Lanka.
Alwis, R. H. N. S., Perera, P. K. P. and Dayawansa, P. N. (2014) Impact of Human Recreational Disturbances on the Distribution of Avifauna in the Sinharaja Forest Reserve, Sri Lanka Proceedings of the 18th International Forestry and Environment Symposium
Dayawansa Nihal (2014) Guide for Student Counselors: Highlighting the use of nature for training, Kline Publishers ISBN 978-955-41408-3-7
Dayawansa P. N. (2014) Fieldcraft: Essential of Nature Interpretation for Nature Education and Environmental Studies, SLCSL Environment Education Guide 2-e-Book Sustainability Learning Centre Sri Lanka ISBN 978-955-41408-4-4
http://sustainability.sjp.ac.lk/wp-content/uploads/2017/11/Fieldcraft-e-Boo.pdf
Dayawansa P. N. (2014) Envitoons, An Inspirational Approach of Teaching and Awareness towards Nature Education and Environmental Studies. SLCSL Environment Education Guide 1- Sustainability Learning Centre Sri Lanka ISBN 978-955-590-035-3
Surathissa D. M., Dayawansa P. N. Rathnayake Upaka and Deepak Chand (2014) Diversity and distribution of fauna in Nasese Shore, Suva, Fiji Islands with reference to existing threats to the biota, International Conference on Oceans and Rivers (ICOR), Fiji Islands, November 2014
Wijesinghe S., Perera P. K. P. and Dayawansa P. N. (2014) Assessment of the Diversity of Avifauna in a Tropical Lowland Forest in South West, Sri Lanka: A Comparative Study of Different Habitats Proceedings of the 19th International Forestry and Environment Symposium 2014
Dayawansa, P. N. (2014) An Introductory Guide to the Study of Behaviour of wading birds Field Ornithology Group of Sri Lanka, University of Colombo ISBN 978-955-41408-2-0
Jayaratne, C., Dayawansa P. N. and Perera P. K. P. (2014) A Preliminary Survey of the Behaviour of Rusty Spotted Cat (Prionailurus rubiginosus) in Captivity Proceedings of the 19th International Forestry and Environment Symposium
Surathissa D.M. and Dayawansa P. N. (2013) University Museums in Sri Lanka
University Museums and Collections (UMAC) Journal pp 67-69
Surathissa D. M. and Dayawansa P. N. (2012) University Museums in Sri Lanka: Honour or disgrace? Proceedings of UMAC Annual Sessions 2012, Singapore
Rathnayake P. Suranga, Mapatuna Y. and Dayawansa P. N. (2012) Restoration of deteriorated wetlands in Kumana (Yala East) National Park. Sri Lanka: a pilot project on mangrove restoration. Proceedings and call for action from an MFF regional colloquium- Sharing lessons on mangrove restoration- Mangroves for the future, August 2012, India
Rathnayake P. Suranga, Mapatuna Y. and Dayawansa P. N. (2012) Restoration of deteriorated wetlands in Kumana (Yala East) National Park, Sri Lanka: A Pilot Project on mangrove restoration. In Sharing lessons on mangrove restoration (2012) Macintosh D.J. Mahindapala R, Markopoulos, M (Editors) IUCN, Gland ISBN 978-2-8317-1558-2
Sudasinghe H. and Dayawansa P. N. (2012) Notes on behavioural ecology of Cnemaspis silvuli in Bodinagala Forest Reserve, Sri Lanka. Proceedings of Herpetological Symposium 2012, University of Peradeniya, Sri Lanka
Dayawansa P. N. (2011) Student Centred Learning: Boon or Bane? Workshop on ‘Innovative Pedagogical Practices in the Twenty-First Century: English in Practice’, Conducted by the Center for Research and Knowledge Dissemination (CRKD) of Sabaragamuwa University of Sri Lanka 30th of June and 01st of July 2011