- Nasonov N. 1892
- O zemlanych postrojkach nekotorych odinoćnych pćel [in Russian]. Varś. Univ. Izv., Varśava 4: 1-11
- National Biodiversity Network. 2016
- Heriades rubicola Perez, 1890 [Bramble Carpenter Bee] [Online]. Available from: https://data.nbn.org.uk [Accessed 6/11/2016].
- National Research Council. 2007
- Status of Pollinators in North America. The National Academies Press, Washington, DC.
- Nedialkov, N. 1914
- Septième contribution à la faune entomologique de la Bulgarie. Spis. bulg. Akad. Nauk 9: 181-209.
- Neumeyer R. 2004
- Aktionsplan Wildbienen (Hymenoptera: Apidae). Fachstelle Naturschutz : 13.
- Nevinson, E.B. 1902
- Hymenoptera Aculeata at Criccieth, Lyndhurst and Newquay. The Entomologist's Monthly Magazine 13(38): 11-12.
- Nevkryta, A.N. 1950
- The pollination of gourds and the efficiency of various insect pollinators . Nauk. Pratsi Inst. Entomol. Fitopatol (Kiev) 1: 101-122.
- Nevkryta, A.N. 1953
- Insect Pollinators of Cultivated Cucurbitaceous Plants. Academy of Sciences of the Ukrainian SSR, Kiev.
- Nielsen, A., Steffan-Dewenter, I., Westphal, C., Messinger, O., Potts, S.G., Roberts, S.P and Petanidou, T. 2011
- Assessing bee species richness in two Mediterranean communities: importance of habitat type and sampling techniques. Ecological research 26(5): 969-983.
- Nielsen, E.T. 1934
- Sur les habitudes des Hyménoptères aculéates-solitaires. IV. (Apidae). Entomologiske Meddelelser 18: 421-472.
- Nieminen, M. and Sundell, P. 2005
- Paahdeympäristöjen myrkky–pistiäiset ja perhoset: vertailu vanhojen ja uusien kohteiden välillä. In: S.Suomen (ed.), Paahdeympäristöjen ekologia ja uhanalaiset lajit [The ecology and threatened species of sunny and dry habitats], pp. 42-51. Sympäristö, Helsinki.
- Nieto, A., Roberts, S.P., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P. and De Meulemeester, T. 2014
- European red list of bees. Luxembourg: Publication Office of the European Union, 98.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Pittioni, B. 1948
- Andrena (Andrenella) enslinella Stckht. und ihre Verwandten. (Hym. Apid.). - Annalen des Naturhistorischen Museums in Wien 56: 130-149.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Peeters, T.M.J., I.P. Raemakers & J. Smit, 1999. - Voorlopige atlas van de Nederlandse bijen (Apidae). European Invertebrate Survey Nederland, Leiden, 230 pp.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Ortiz-Sánchez, F.J. & Patiny, S., 2007 - Nuevos datos de captura para Flavipanurgus granadensis (Warncke, 1967) (Hymenoptera, Apoidea, Andrenidae). Boletín de la Sociedad Entomológica Aragonesa, 41, 265–266.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Ødegaard, F., 2012. - Basis for action plan for Osmia maritima. NINA report, 846, 1-37.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Notton, D. G., Tang, C. Q. & Day, A. R. 2016. Viper’s Bugloss Mason Bee, Hoplitis (Hoplitis) adunca, new to Britain (Hymenoptera, Megachilidae, Megachilinae, Osmiini). British Journal of Entomology and Natural History 29: 134–143.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Pauly, A. & Belval, S. 2017 Atlas des Halictidae de France (Hymenoptera: Apoidea), Belgian Journal of Entomology. 53: 1-34
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Ortiz-Sanchez, J. & Pauly, A 2017 Halictinae d'Espagne Belgian Journal of Entomology. 54: 1-92
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Roberts et al. 2011,
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Tomozei, B., 2008 - Checklist of Bees of the genera Colletes Latreille 1930 and Hylaeus Fabricius 1793 of Romania (Hymenoptera: Apiformes: Colletidae) Faunistic Entomology – Entomologie faunistique 2008 61 (3), 87-97
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Pesenko Y. A. , J. Banaszak, V.G. Radchenko & T. Cierzniak 2000. - Bees of the Family Halictidae (Excluding Sphecodes) of Poland; Taxonomy, Ecology, Bionomics.Wydawnictwo Uczelniane
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Westrich, P., 2008 - The neophytes Solidago canadensis and Solidago gigantea as pollen sources of the bee Colletes collaris Dours (Hymenoptera: Apidae). Eucera, Heft 2: pp 30-32
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Smit, J. 2018 Identification key to the European species of the bee genus Nomada Scopoli, 1770 (Hymenoptera: Apidae), including 23 new species. Entomofauna Monographie 3: 1-253 Ansfelden
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Wind, P. & Pihl, S. (eds.) 2010: The Danish Red List. - The National Environmental Research Institute, Aarhus University [2004]-. http://redlist.dmu.dk (updated April 2010)
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.Söderman, G. and Leinonen, R. 2003. Suomen Mesipistiäiset ja niiden uhanalaisuus. Tremex Press Oy, Helsinki.
- Nieuwenhuijsen, H., Blommers, L., Goudsmits, K., Megens, P., Smit, J. and Smits, J. 2008
- Een ééndaagse inventarisatie van de bijen en wespen van Kwintelooijen, Plantage Willem III en de Palmerswaard. Verslag van de excursie van de sectie Hymenoptera naar Rhenen op 21.4.2007. Nieuwsbrief Sectie Hymenoptera Nederlandse Entomologische Vereniging 27: 4-10.
- Nikiforuk, K.S. 1957
- Bees of the Bashkir ASSR. Notes of Bashkir Branch of the Geographical Society of the USSR 1: 139–162.
- Nilsson, L.A. 2003
- Prerevisional checklist and synonymy of the bees of Sweden (Hymenoptera: Apoidea). ArtDatabanken.
- Nilsson, S.G., Franzén, M. and Norén, L. 2007
- Hög artrikedom av vildbin i Linnés hembygd i Stenbrohult. Fauna och Flora 102(2): 2-12.
- NNieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014
- European Red List of bees. Luxembourg: Publication Office of the European Union.
- NobiIe, V., Turrisi, G.F. 2016
- New or little known Nomada Scopoli from Italy (Hymenoptera, Apoidea, Apidae). Boll. Soc. Entomol. Ital., 148 (2): 51-55, ISSN 0373-3491
- Nobile, V. and Campadelli, G. 1998
- Il genere Sphecodes Latreille 1804 in Italia (Hymenoptera, Apoidea, Halictidae). Bolletino dell'Istituto di Entomologia della Università di Bologna 52: 85-403.
- Nobile, V., Meloni, C. and Tomarchia, S. 2005
- Andrena nuove per la Sicilla e la Sardegna (Hymenoptera, Andrenidae). 1. Bolletino della Società Entomologica Italiana 137(3): 223-228.
- Noskiewicz, J. 1923
- Nowe dla fauny Polski i rzadkie błonkówki. Polskie Pismo Entomologiczne, Lwów 2: 176—184.
- Noskiewicz, J. 1922
- Für Kleinpolen neue Aculeatenformen. Bulletin Entomologique de Pologne 1: 7-9.
- Noskiewicz, J. 1934
- Najważniejsze wyniki mych badań na Podolu w zakresie fauny Błonkówek (Hymenoptera) w latach 1932-1935. Polskie Pismo Entomologiczne, Lwów 13 (1-4): 132—183.
- Noskiewicz, J. 1924
- [Neue für Polens Fauna und seltenere Hymenopteren] Nowe dla fauny Polski i rzadkie blonkówki. . Polskie Pismo Entomologiczne 2(4): 176-186.
- Noskiewicz, J. 1930
- Drei neue Bienen aus Polen. Polskie Pismo ent. 9: 260-267.
- Notton, D.G. and Dathe, H.H. 2008
- William Kirby's types of Hylaeus Fabricius (Hymenoptera, Colletidae) in the collection of the Natural History Museum, London,Journal of Natural History,42:27,1861-1865
- Novitates 3808
- 1–20. https://doi.org/10.1206/3808.1
- Nowakowski, M. & Pywell, R.F. 2016
- Habitat Creation and Management for Pollinators. Wallingford, UK, Natural Environment Research Council (Centre for Ecology and Hydrology), Wildlife Farming Company, p. ii+86. http://www.ceh.ac.uk/sites/default/files/Habitat Management and Creation For Pollinators.pdf.