Articles in nonrefereed journals:
- Wahlberg, N. 1988: Observations from Simbai. Muruk 3:41-47.
- Wahlberg, N. 1990: Barred Owlet-Nightjar Aegotheles cristatus at the King Bird Tree. Muruk 4:111.
- Wahlberg, N. 1990: Display of the Glossy-mantled Manucode Manucodia atra. Muruk 4:64.
- Wahlberg, N. 1990: Mimicry by Singing Bushlark Mirafra javanica. Muruk 4:62.
- Wahlberg, N. 1990: Straw-necked Ibis Threskiornis spinicollis at Kanosia Lagoon, Central Province. Muruk 4:109.
- Wahlberg, N. 1992: Altitude range extension for the Crested Bird of Paradise Cnemophilus macgregorii. Muruk 5:92.
- Wahlberg, N. 1992: Observations of birds feeding in a fruiting fig Ficus sp. in Varirata National Park. Muruk 5:109-110.
- Chemnick, J., R. Hicks & N. Wahlberg 1993: Nesting Brown-backed Honeyeaters Ramsayornis modestus with strange plumage. Muruk 6:45.
- Wahlberg, N. 1993: Courtship display of the Long-billed Honeyeater Melilestes megarhynchus. Muruk 6:22.
- Pekkarinen, A., I. Teräs, M. Koivula, J. Pöyry & Wahlberg, N. 1994: Polymorphic melanism of bumblebees in Finland and neighbouring areas (Hymenoptera: Apidae). [In Finnish with English summary] Baptria 19:85-90.
- Wahlberg, N., Veistola, S. & Veistola, T. 1994. Beware - this bird is poisonous. [In Finnish] Linnut 29:34.
- Wahlberg, N. 1995: The reproductive biology of the Glanville fritillary (Melitaea cinxia) [In Finnish with English summary]. Baptria 20:181-187.
- Wahlberg, N. 1996: The life history of the false heath frtillary (Melitaea diamina) in Finland [In Finnish with English summary]. Baptria 21:113-118.
- Wahlberg, N., J.-P.C. Bäckman & M. Pitkänen 1996: What is the future of the false heath fritillary in the Tampere region? [In Finnish] Diamina 1996:6-10.
- Klemetti, T. & Wahlberg, N. 1997: The ecology and population structure of the marsh fritillary (Euphydryas aurinia) in Finland. [In Finnish with English summary] Baptria 22:87-93.
- Wahlberg, N. 1997: The life history of the heath frtillary (Mellicta athalia) in southern Finland [In Finnish with English summary]. Baptria 22:149-153.
- Wahlberg, N. 1997: The life history and ecology of Melitaea diamina (Lang, 1789) (Nymphalidae) in Finland. Nota lepidopterologica 20:70-81 .
- Wahlberg, N. 1998: The life history and ecology of Euphydryas maturna (Nymphalidae: Melitaeini) in Finland. Nota lepidopterologica 21:154-169.
- Wahlberg, N. 1998: Threatened species in Finland - false heath fritillary (Melitaea diamina). [In Finnish with English summary]. Suomen Ympäristö 68:1-40.
- Salminen, J. & Wahlberg, N. 1998: The ecology and taxonomic status of the northern subspecies of the heath fritillary (Mellicta athalia norvegica). [In Finnish with English summary] Baptria 23:186-193.
- Wahlberg, N. 1999: The habitat of Euphydryas maturna in Finland. [In Finnish with English summary] Baptria 24:173-177.
- Pöyry, J., Wahlberg, N. & Nieminen, M. 2001: Translocation of Lepidoptera in species conservation. [In Finnish with English summary] Baptria 26:18-28.
- Wahlberg, N. & Peña, C. 2007: A Dominican Republic sojourn. News of the Lepidopterists' Society 49:12-15.
- Balletto, E., Bonelli, S., Settele, J., Thomas, J. A., Verovnik, R. & Wahlberg, N. 2010: Case 3508: Maculinea Van Eecke, 1915 (Lepidoptera: Lycaenidae): proposed precedence over Phengaris Doherty, 1891. Bulletin of Zoological Nomenclature 67:129-132.
(Muruk is the official journal of the Papua New Guinea Bird Society and Baptria is the official journal of the Lepidopterological Society of Finland)