Selected publications

2023

Bauer B, Morawetz L, Ribarts A, Wüest R & Krenn HW. 2023. Impact of heat stress on flower visitation and pollination of Phaseolus coccineus by honey bees (Apis mellifera). Journal of Apicultural Research, DOI: 10.1080/00218839.2023.2277986 Link. Published online 29 November 2023

Barton S, Virgo J, Krenn HW. The Mouthparts of Female Blood-Feeding Frog-Biting Midges (Corethrellidae, Diptera). Insects. 2023; 14(5):461. doi.org/10.3390/insects14050461 . Link. Published online 13 May 2023

2022

Reinwald C, Bauder JA-S, Karolyi F, Neulinger M, Jaros S, Metscher B, & Krenn HW. 2022. Evolutionary functional morphology of the proboscis and feeding apparatus of hawk moths (Sphingidae: Lepidoptera). Journal of Morphology, 1– 21. doi.org/10.1002/jmor.21510 . Link. Published online 5 September 2022

Kuba K & Krenn HW (2022) Filtration of Nutritional Fluids in the German Wasp Vespula germanica (Vespidae, Hymenoptera). Insects. 2022; 13(2):185. https://doi.org/10.3390/insects13020185. Link. Published online 10 February 2022

2021

Krenn HW, Karolyi F, Lampert P, Melin A, Colville JF (2021) Nectar Uptake of a Long-Proboscid Prosoeca Fly (Nemestrinidae)—Proboscis Morphology and Flower Shape. Insects. 2021; 12(4):371. doi.org/10.3390/insects12040371. Link. Published online 20 April 2021

Zenz K, Zettel H, Kuhlmann M & Krenn HW (2021) Morphology, pollen preferences and DNA-barcoding of five Austrian species in the Colletes succinctus group (Hymenoptera, Apidae). Deutsche Entomologische Zeitschrift 68(1): 101-138. doi.org/10.3897/dez.68.55732. Link. Published online 2 February 2021.

2020

Pinterich E & Krenn HW (2020) Fruit-feeding behavior of the butterfly Consul fabius (Charaxinae, Nymphalidae, Lepidoptera). Entomologica Austriaca 27: 91–105. Link. Published online 14 March 2020

2019

Krenn HW (Ed.) (2019) Insect Mouthparts Form, Function, Development and Performance Springer International Publishing

Krenn HW (2019) Introduction: Ecological Importance of Insect Feeding. In: Krenn HW (ed) Insect Mouthparts – Form, Function, Development and Performance. Zoological Monographs 5, Springer Nature Switzerland, pp. 1-7

Krenn HW (2019) Form and Function of Insect Mouthparts. In: Krenn HW (ed) Insect Mouthparts – Form, Function, Development and Performance. Zoological Monographs 5, Springer Nature Switzerland, pp 9-46

Krenn HW (2019) Fluid-Feeding Mouthparts. In: Krenn HW (ed) Insect Mouthparts – Form, Function, Development and Performance. Zoological Monographs 5, Springer Nature Switzerland, pp 47-99

Mauss V, Kuba K, Krenn HW (2019) Evolution of the Multifunctional Mouthparts of Adult Vespidae. In: Krenn HW (ed) Insect Mouthparts – Form, Function, Development and Performance. Zoological Monographs 5, Springer Nature Switzerland, pp 443-478

Shi L, Wu J, Krenn H, Yang Y & Yan S (2020). Temporal mode of fluid-feeding mechanisms in a long proboscid orchid bee compared to the short proboscid honey bee. Journal of Theoretical Biology 484: 110017 published online 19 September 2019, doi.org/10.1016/j.jtbi.2019.11001

Melin A, Krenn HW, Beale CM, Manning JC & Colville JF (2019) The allometry of proboscis length in Melittidae (Hymenoptera: Apoidae) and an estimate of their foraging distance using museum collections. PLoS ONE 14(6): e0217839, doi.org/10.1371/journal.pone.0217839 Published 7 June 2019

2018
Düster JV, Gruber MH, Karolyi F, Plant J D, Krenn HW (2018) Drinking with a very long proboscis: Functional morphology of orchid bee mouthparts (Euglossini, Apidae, Hymenoptera). Arthropod Structure & Development 47, 25-35

Baranek B, Kuba K, Bauder JA-S, Krenn HW (2018) Mouthpart dimorphism in male and female wasps of Vespula vulgaris and Vespula germanica (Vespidae, Hymenoptera). Deutsche Entomologische Zeitschrift. 65(1): 65-74 doi: 10.3897

Savchenko E, Nicklas L, Milasowszky N, Krenn HW (2018) Zeitliche und räumliche Verteilung alpiner Tagfalter (Papilionoidea) entlang eines Höhengradienten in den Zillertaler Alpen (Österreich). Entomologica Austriaca 25: 25-49

2017
Ivenz D. & Krenn HW (2017) Schwebfliegen-Gemeinschaften (Diptera: Syrphidae) im Nationalpark Gesäuse (Österreich). Entomologica Austriaca 24: 7-26

Krenn HW, Bauder JAS (2017) Morphological fine tuning of the feeding apparatus to proboscis length in Hesperiidae (Lepidoptera). Journal of Morphology 279 (3): 396-408.

2016
Kreiderits A, Gamauf A, Krenn HW & Sumasgutner P (2016) Investigating the influence of local weather conditions and alternative prey composition on the breeding performance of urban Eurasian Kestrels (Falco tinnunculus). Bird Study/Ringing & Migration 1-12, available online

Krenn HW, Fournel J, Bauder J A-S & Hugel S (2016) Mouthparts and nectar feeding of the flower visiting cricket Glomeremus orchidophilus (Gryllacrididae). Arthropod Structure & Development 45 (2016) 221-229. available online

Karolyi F, Hansal T, Krenn, HW, Colville JF (2016) Comparative morphology of the mouthparts of the megadiverse South African monkey beetles (Scarabaeidae: Hopliini): feeding adaptations and guild structure. PeerJ 4:e1597
DOI 10.7717/peerj.1597

Hickel C, Gereben-Krenn B-A, Zweimüller I, Krenn HW (2016) Wetterbedingungen für die Erfassung von Tagfaltern (Lepidoptera: Papilionoidea) in alpinen -Lebensräumen in Österreich Entomologia Austriaca 23: 7-18. PDF

2015
Bauder J, Morawetz L, Warren A, Krenn HW (2015) Functional constraints on the evolution of long butterfly proboscides: Lessons from Neotropical skippers (Lepidoptera: Hesperiidae) Journal of Evolutionary Biology 28: 678-687.
doi: 10.1111/jeb.12601

Bauder J, Warren A, Krenn HW (2015) The ecological role of extremely long-proboscid Neotropical butterflies (Lepidoptera: Hesperiidae) in plant-pollinator networks. Arthropod-Plant Interactions DOI 10.1007/s11829-015-9379-7. 

Barcaba T, Krenn HW (2015) The mouthparts of adult Indian meal moths, Plodia interpunctella (HÜBNER 1813) (Lepidoptera: Pyralidae). Entomologia Austriaca 22: 91-105.

Pass G, Tögel M, Krenn H, Paululat A (2015) The circulatory organs of insect wings: Prime examles for the origin of evolutionary noveties. Zoologischer Anzeiger 256: 82-95, available online.

Bossert, S, Gereben-Krenn, B-A, Neumayer, J, Schneller, B, Krenn, HW (2015) The cryptic Bombus lucorum complex (Hymenoptera: Apidae) in 1 Austria: Distribution, habitat usage and a climatic characterization based on COI sequence data. Zoological Studies 55: 13 (2016), doi:10.6620/ZS.2016.55-13.

2014
Hölzl M, Gereben-Krenn B-A, Moser D, Krenn HW (2014) Bestandesrückgang der Mehlschwalbe (Delichon urbicum) in Wien: Resultate einer Bestandeserhebung im Jahr 2013. Vogelkundliche Nachrichten aus Ostösterreich 25: 10-20 

Sumasgutner P, Nemeth E, Tebb G., Krenn HW, Gamauf A (2014) Hard times in the city - attractive nest sites but insufficient food supply lead to low reproduction rates in a bird of prey. ─ Frontiers in Zoology 11:48.

Sumasgutner P, Schulze CH, Krenn HW, Gamauf A (2014) Conservation related conflicts in the nest-site selection of the Eurasian Kestrel (Falco tinnunculus) and the distribution of its avian prey. ─ Landscape and Urban Planning. doi:10.1016/j.landurbplan.2014.03.009.

Krenn HW, Bauder J A-S, Karolyi F, Gruber MH. 2014. Extremely long mouthparts in flower-visiting insects: form, function and evolution- Extrem lange Mundwerkzeuge blütenbesuchender Insekten: Form, Funktion und Evolution. Entomologisches Kolloquium 22.03.2014, Graz, Entomologica Austriaca 21: 241

Krenn HW, Bauder J A-S, Warren AD. 2014. World record holder in proboscis length of butterflies: the Neotropical skipper Damas immaculata (Hesperiidae). 7th International Conference on the Biology of Butterflies, August 11-14, 2014, Turku.

2013
Bauder J A-S, Handschuh S, Metscher B D, Krenn HW (2013) Functional morphology of the feeding apparatus and evolution of proboscis length in metalmark butterflies (Lepidoptera: Riodinidae). Biological Journal of the Linnean Society, 110(2): 291-304. IF 2.413

Karolyi F, Morawetz L, Colville JF, Handschuh F, Metscher BD, Krenn HW (2013) Time management and nectar flow: flower handling and suction feeding in long-proboscid flies (Nemestrinidae: Prosoeca). Naturwissenschaften 100: 1083-1093, DOI 10.1007/s00114-013-1114-6. IF 2.144

Sumasgutner P, Krenn HW, Düesberg J, Gaspar T, Gamauf A. 2013. Diet specialisation and breeding success along an urban gradient: the kestrel (Falco tinnunculus) in Vienna, Austria. Beiträge zur Jagd und Wild 38 385-397.

Bauder J A-S, Krenn HW. La Gamba – ein Restaurant für Schmetterlinge. 2013. In: Roland A., Werner H., S.Pamperl, W. Wanek, A.Weber, A. Weissenhofer (eds) 20 Jahre Tropenstation La Gamba. Verein zur Förderung der Tropenstation La Gamba, Universität Wien, 80-81.

2012
Krenn HW & Aspöck H (2012) Form, function and evolution of the mouthparts of blood-feeding Arthropoda. Arthropod Structure & Development 41 (2012) 101-118 

Wilhelmi AP & Krenn HW (2012) Elongated mouthparts of nectar-feeding
Meloidae (Coleoptera). Zoomorphology, (DOI) 10.1007/s00435-012-0162-3 

2011
Bauder J, Lieskonig N, Krenn HW (2011) The extremely long-tongued Neotropical butterfly Eurybia lycisca (Riodinidae): Proboscis morphology and flower handling. Arthropod Structure & Development 40: 122-127

Gereben-Krenn B-A, Krenn HW, Strodl MA (2011) Initial Colonization of New Terrain in an Alpine Glacier Foreland by Carabid Beetles (Carabidae, Coleoptera). Arctic, Antarctic and Alpine Research 43, 397-403

Hikl A-L, Krenn HW (2011) Pollen processing behaviour of Heliconius butterflies: A derived grooming behaviour. Journal of Insect Science 11, Article 95, available online: insectscience.org/11.95

2010
Gokcezade JF, Gereben-Krenn B-A, Neumayer J & Krenn HW (2010) Feldbestimmungsschlüssel für die Hummeln Österreichs, Deutschlands und der Schweiz (Hymenoptera, Apidae). Linzer biologische Beiträge 42/1, 5-42  

Krenn HW, Wiemers M, Maurer L, Pemmer V, Huber W, Weissenhofer A, Albert R (2010) Butterflies of the Golfo Dulce Region Costa Rica. Verein zur Förderung der Tropenstation La Gamba Costa Rica, pp 76.  

Sumasgutner P, Zuna-Kratky T & Krenn HW (2010) Einfluss der Waldstruktur auf die Nistplatzwahl von Greifvögeln in den March-Auen/Niederösterreich. Vogelwarte 48, 81-95.

Strodl MA, Gereben-Krenn BA, Huber C & Krenn HW (2010) Die Larven der alpinen Laufkäfergattung Oreonebria K. Daniel, 1903 in Österreich (Coleoptera: Carabidae). Contributions to Natural History 14: 1-20

Steinwender BM, Krenn HW, Wegensteiner R (2010) Different effects of the insectpathogenic fungus Beauveria bassiana (Deuteromycota) on the bark beetle Ips sexdentatus (Coleoptera: Curcullionidae) and on its predator Thanasimus formicarius (Coleoptera: Cleridae). Journal of Plant Deseases and Protection 117/1: 33-38  

Krenn HW (2010) Feeding mechanisms of adult Lepidoptera: structure, function, and evolution of the mouthparts. Annual Review of Entomology 55: 307-327 PDF

2009
Eberhard SH, Hikl A-L, Boggs CL, Krenn HW (2009) Saliva or regurgitated nectar? What Heliconius butterflies (Lepidoptera: Nymphalidae) use for pollen feeding. Entomol Soc America 102/6: 1105-1108

Krenn HW,  Eberhard MJB,  Eberhard SH,  Hikl A-L, W Huber & Gilbert LE (2009) Mechanical damage to pollen aids nutrient acquisition in Heliconius butterflies (Nymphalidae) Arthopod-Plant Interactions 3/4: 203-208

Eberhard SH, Nemeschkal HL & Krenn HW (2009) Biometrical evidence for adaptation of the salivary glands to pollen-feeding Heliconius butterflies (Lepidoptera: Nymphalidae). Biological Journal of the Linnnean Society 97: 604-612

Karolyi F, Gorb SN & Krenn HW (2009) Pollen grains adhere to the moist mouthparts in the flower visiting beetle Cetonia aurata (Scarabaeidae, Coleoptera). Arthopod-Plant Interactions 3: 1-8

2008
Krenn HW, Gereben-Krenn B-A, Steinwender BM, Popov A (2008) Flower visiting Neuroptera: mouthparts and feeding behaviour of Nemoptera sinuata (Nemopteridae). European Journal of Entomology 105: 267-277

Eberhard SH & Krenn HW (2008) Morphometry of the salivary glands in pollen-feeding butterflies of the genus Heliconius. Abstract Number: 644. XXIII International Congress of Entomology 2008 in Durban, South Africa, July 6-12 2008, p 420  

Krenn, HW (2008) Feeding behaviours of neotropical butterflies. In Weissenhofer A, Huber W, Mayer V, Pamperl, Weber A, Aubrecht G (Eds) Natural and Cultural History of the Golfo Dulce Region, Costa Rica, Stapfia 88 zugleich Kataloge der oberösterreichischen Landesmuseen Neue Serie 80, Biologiezentrum der Oberösterreichischen Landesmuseen, pp 295-304

2007
Eberhard SH, Hrassnigg N, Crailsheim K, Krenn HW (2007) Evidence of protease in the saliva of the butterfly Heliconius melpomene (L.) (Nymphalidae, Lepidoptera). Journal of Insect Physiology 53: 126-131  

Hilgartner, R, Raoilison M, Büttiker W, Lees DC, Krenn WH (2007) Malagasy birds as hosts for eye-frequenting moths. Biology letters 3/2: 117-120. DOI:10.1098/rsbl.2006.0581

Krenn, HW (2007) Evidence from mouthpart Structure on internodial  relationships in Endopterygota? Arthropod Systematics & Phylogeny 65(1): 7-14

Schneider M, Krenn HW (2007) Nahrungsaufnahme von Acheta domesticus – Anleitung für ein Experiment im Biologieunterricht. Bioskop 2/2007: 34-40

Krenn HW (2007) In the butterfly restaurant. 5th International Conference on the Biology of Butterflies, Monte Porzio Catone (Roma) 2. – 7. 7. 2007

Strodl M, Gereben-Krenn B-A, Krenn, HW (2007) Block fields, stony debris formations and dolines as habitats of alpine arthropods - Evaluations of a new subterranean trap. Berichte des Naturwissenschaftlich-Medizinischen Vereins in Innsbruck  

2006
Borrell BJ, Krenn HW (2006) Nectar feeding in long-proboscis insects. In Herrel A, Speck T & Rowe NP (eds) Ecology and Biomechanics: A mechanical approach to the Ecology of Animals and Plants, CRC Press LLC, 185-212  

Krenn HW (2006) Biodiversität neotropischer Tagfalter und die Vielfalt ihrer Nahrung. In Borsdorf A & Hödl W (Hg.) Naturraum Lateinamerika Geographische und biologische Grundlagen. Jahrbuch des Österreichischen Lateinamerika-Instituts Band 10, LIT-Verlag Wien, p 229-242  

2005
Krenn HW, Plant J, Szucsich NU (2005) Mouthparts of flower-visiting insects. Arthropod Structure & Development 34: 1-40

Molleman F, Krenn HW, Van Alphen ME, Brakefield PM, DeVries, PJ, Zwaan BJ (2005) Food intake of fruit-feeding butterflies: evidence for adaptive variation in proboscis morphology. Biological Journal of the Linnean Society 86: 333-343.  

Eberhard S, Krenn HW (2005) Anatomy of the oral valve in nymphalid butterflies and model of fluid uptake of liquid food in Lepidoptera. Zoologischer Anzeiger 243: 305-312.  

2004
Krenn HW,  Kristensen NP 2004 Evolution of proboscis musculature in Lepidoptera. European Journal of Entomology 101: 565-575

Pernstich A, Krenn HW (ed.)(2004) Die Tierwelt des Botanischen Gartens der Universität ein – Eine Oase inmitten der Großstadt. Institut für Angewandte Biologie und Umweltbildung, Wien  

Krenn HW, Weisert, F, Gereben-Krenn, B-A (2004) Die Schmetterlinge des Botanischen Gartens der Universität Wien. In Pernstich A, Krenn HW (Hsg.) Die Tierwelt des Botanischen Gartens der Universität ein – Eine Oase inmitten der Großstadt, p 121-133

Krenn HW, Gereben-Krenn, B-A (2004) Die Vögel des Botanischen Gartens der Universität Wien. In Pernstich A, Krenn HW (Hsg.) Die Tierwelt des Botanischen Gartens der Universität ein – Eine Oase inmitten der Großstadt, p 135-139

2003
Eberhard S, Krenn HW (2003) Salivary glands and salivary pumps of adult butterflies (Nymphalidae, Lepidoptera). Zoomorphology 122: 161-167  

Pernstich A, Krenn HW, Pass G (2003) Preparation of serial sections of arthropods using 2,2-dimethoxypropane dehydration and epoxy resin embedding under vacuum. Biotechnic & Histochemistry 78: 1-5

Knopp MCN, Krenn HW (2003) Efficiency of fruit juice feeding in Morpho peleides (Nymphalidae, Lepidoptera). Journal of Insect Behavior 16: 67-77

2002
Pellmyr O, Krenn HW (2002) Origin of a complex key innovation in an obligate insect-plant mutualism. Proceedings of the National Academy of Science 99/8: 5498-5502 PDF 

Krenn HW, Pernstich A, Messner T, Hannappel U, Paulus HF (2002) Kirschen als Nahrung des männlichen Hirschkäfers, Lucanus cervus (Linnaeus 1758)(Lucanidae: Coleoptera). Entomologische Zeitschrift 112/6: 165-170

Szucsich NU, Krenn HW (2002) Flies and concealed nectar sources: morphological innovations in the proboscis of Bombyliidae (Diptera). Acta Zoologica 83: 183-192  

Krenn HW, Mühlberger N (2002) Groundplan anatomy of the proboscis of butterflies (Papilionoidea, Lepidoptera). Zoologischer Anzeiger 241: 369-380 

Krenn HW, Mauss V, Plant J (2002) Evolution of the suctorial proboscis in pollen wasps (Masarinae, Vespidae). Arthopod Structure and Development 31: 103-120

Krenn HW, Schratt-Ehrendorfer L (2002) Transparente Plastikbeutel zur Untersuchung von Arthropoden. Entomologische Zeitschrift 112/11: 349-350 

2001
Krenn HW, Zulka KP, Gatschnegg T (2001) Proboscis morphology and food preferences in Nymphalidae (Lepidoptera, Papilionoidea). Journal of Zoology, London 253, 17-26

2000
Krenn HW, Kristensen NP (2000) Early evolution of the proboscis of Lepidoptera: external morphology of the galea in basal glossatan moths, with remarks on the origin of the pilifers. Zoologischer Anzeiger 239: 179-196

Krenn HW (2000) Proboscis musculature in the butterfly Vanessa cardui (Nymphalidae, Lepidoptera): settling the proboscis recoiling controversy. Acta Zoologica Stockholm 81: 259-266

Szucsich NU, Krenn HW (2000) Morphology and function of the proboscis in Bombyliidae (Diptera, Brachycera) and implications for proboscis evolution in Brachycera. Zoomorphology 120: 79-90

Penz CM, Krenn HW (2000) Behavioral adaptations to pollen-feeding in Heliconius butterflies (Nymphalidae, Heliconiinae): an experiment using Lantana flowers. Journal of Insect Behavior 13: 865-880

Gereben-Krenn B-A, Krenn HW (2000) Living at the edge of ice: carabid beetles in an alpine glacier foreland. In: Gazzoni DL (Ed). XXI International Congress of Entomology, Brazil, August 20-26, 2000, Abstracts of International Congress of Entomology Londrina Brazil: Embrapa Soja, 2000. Vol 2: 902  

1999
Krenn HW, Gereben-Krenn B-A (1999) Saatkrähen (Corvus frugilegus L.) im Winter 1998/99 in Wien. Vogelkundliche Nachrichten aus Ostösterreich 10: 49-51

1998
Krenn HW (1998) Proboscis sensilla in Vanessa cardui (Nymphalidae, Lepidoptera) - functional morphology and significance in flower-probing. Zoomorphology. 118: 23-30

Krenn HW, Penz CM (1998) Mouthparts of Heliconius butterflies (Lepidoptera: Nymphalidae): a search for anatomical adaptations to pollen-feeding behaviour. International Journal of Insect Morphology & Embryology 27: 301-309

1997
Krenn HW (1997) Proboscis assembly in Lepidoptera - a once in a lifetime sequence of events. European Journal of Entomology 94: 495-501

Wolf B, Krenn HW, Gereben-Krenn B-A (1997) Der Bestand der Saatkrähen (Corvus frugilegus L. 1758) an den großen Winterschlafplätzen in Wien 1996/97. Vogelkundliche Nachrichten aus Ostösterreich 8: 71-74

1996
Paulus HF, Krenn HW (1996) Vergleichende Morphologie des Schmetterlingsrüssels und seiner Sensillen - Ein Beitrag zur phylogenetischen Systematik der Papilionoidea (Insecta, Lepidoptera). Journal of Zoological Systematics and Evolutionary Research 34: 203-216

Büttiker W, Krenn HW, Putterill J (1996) The proboscis of eye-frequenting and piercing Lepidoptera. Zoomorphology 116: 77-83

1995
Gereben B-A, Wolf B, Krenn HW (1995) Der Bestand der Saat­krähen (Corvus frugilegus L. 1758) an den großen Winter­schlafplätzen in Wien 1994/95. Vogelkundliche Nachrichten aus Ostösterreich 6/2: 43-46

1994
Krenn HW, Pass G (1994) Morphological diversity and phylogenetic analysis of wing circulatory organs in insects, part 1: Non-Holometabola. Zoology 98: 7-22.

Krenn HW, Pass G (1994/1995) Morphological diversity and phylogenetic analysis of wing circulatory organs in insects, part 2: Holometabola. Zoology 98: 147-164

1993
Krenn HW (1993) Postembryonic development of accessory wing circulatory organs in Locusta migratoria (Orthoptera: Acridiidae). Zoologischer Anzeiger 230: 227-236

Krenn HW, Pass G (1993) Wing-hearts in Mecoptera (Insecta). International Journal of Insect Morphology & Embryology 22: 63-76

Krenn HW, Gereben B-A, Wolf B (1993) Der Bestand der Saatkrähen(Corvus frugilegus) an den Winterschlafplätzen in Wien 1992/93. Vogelkundliche Nachrichten aus Ostösterreich 4/3: 85-89

1991
Krenn HW (1991) Der Winterschlafplatz der Saatkrähen (Corvus frugilegus) auf der Baumgartner Höhe in Wien. Vogelkundliche Nachrichten aus Ostösterreich 2/3: 1-7

1990
Krenn HW (1990) Functional morphology and movements of the proboscis of Lepidoptera (Insecta). Zoomorphology 110: 105-114