Craesus septentrionalis (Linnaeus, 1758)
(Hazel Sawfly, Birch Sawfly)

Interactions where Craesus septentrionalis is the controlling partner and gains from the process

The following relationships have been collated from the published literature (see 'References').

Stage		Summary			Taxon	Vernacular	Classification	References	Darwin Classification of Active Taxon	Active Taxon	Active Vernacular	Active Taxon Uncertain	Active State	Active Part	Active Stage	Relationship	Relationship Uncertain	Relationship Geography	Darwin Classification of Passive Taxon	Passive Taxon	Passive Vernacular	Passive Taxon Uncertain	Passive State	Passive Part	Passive Stage	Passive Taxon's significance to Active Taxon	Indoors etc	Season
larva (gregarious)		gregarious larva grazes on live leaf edge			Alnus	alders	Fagales: Betulaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Fagales/Betulaceae/Alnus/	Alnus	alders		live	leaf edge		Major		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Betula	birches	Fagales: Betulaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Fagales/Betulaceae/Betula/	Betula	birches		live	leaf edge		Major		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Carpinus betulus	Hornbeam	Fagales: Betulaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Fagales/Betulaceae/Carpinus betulus/	Carpinus betulus	hornbeam		live	leaf edge		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Corylus	hazels	Fagales: Betulaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Fagales/Betulaceae/Corylus/	Corylus	hazels		live	leaf edge		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf (margin)			Fraxinus	ashes	Lamiales: Oleaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Lamiales/Oleaceae/Fraxinus/	Fraxinus	ashes		live	leaf (margin)		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Populus	poplars	Malpighiales: Salicaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Salicaceae/Populus/	Populus	poplars		live	leaf edge		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Salix	willows	Malpighiales: Salicaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Salicaceae/Salix/	Salix	willows		live	leaf edge		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			Sorbus	whitebeams	Rosales: Rosaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Sorbus/	Sorbus	whitebeams		live	leaf edge		Minor
larva (gregarious)		gregarious larva grazes on live leaf edge			Acer	maples	Sapindales: Sapindaceae	Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958 Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Sapindales/Sapindaceae/Acer/	Acer	maples		live	leaf edge		Minor		(5-)
larva (gregarious)		gregarious larva grazes on live leaf edge			[Broadleaved trees and shrubs]	broadleaved trees and shrubs		Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958	/Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Craesus septentrionalis/	Craesus septentrionalis	hazel sawfly, birch sawfly		gregarious		larva	Foodplant / open feeder			/Plantae/Tracheophyta/Magnoliopsida/Broadleaved trees and shrubs/	Broadleaved trees and shrubs	broadleaved trees and shrubs		live	leaf edge

Craesus septentrionalis (Hazel Sawfly, Birch Sawfly) may also be included in 'feeds on' relations listed under the following higher taxa:

TENTHREDINIDAE
(a family of sawflies)

HYMENOPTERA
(ants, bees and wasps, sawflies and parasitoid wasps)

INSECTA
(true insects)

Craesus septentrionalis (Hazel Sawfly, Birch Sawfly) may be included in 'fed on by' relations listed under the following higher taxa:

TENTHREDINIDAE
(a family of sawflies)

SYMPHYTA
(sawflies)

HYMENOPTERA
(ants, bees and wasps, sawflies and parasitoid wasps)

INSECTA
(true insects)

HEXAPODA
(insects and other 6-legged organisms)

ARTHROPODA
(arthropods)

ANIMALIA
(animals)

Invertebrates
(Invertebrates)

Author & Year	Title	Source
Benson, R.B., 1958	Hymenoptera: 2. Symphyta. Section (c)	Handbooks for the Identification of British Insects , Vol VI, Part 2(c), 252pp, The Royal Entomological Society of London
Buczacki, S. & Harris, K., 1998	Pests, Diseases & Disorders of Garden Plants	Collins Photoguide, 2nd edition edition, Collins

Taxonomic hierarchy:

Species	Craesus septentrionalis (Hazel Sawfly, Birch Sawfly)
Genus	Craesus (a genus of sawflies)
Family	TENTHREDINIDAE (a family of sawflies)
Superfamily	TENTHREDINOIDEA (a superfamily of sawflies)
Suborder	SYMPHYTA (sawflies)
Order	HYMENOPTERA (ants, bees and wasps, sawflies and parasitoid wasps)
Division	Endopterygota (bees, beetles, flies, moths and other insects with wings developing internally)
Infraclass	Neoptera (bees, beetles, flies, grasshoppers, moths and other advanced insects)
Subclass	PTERYGOTA (bees, beetles, dragonflies, flies, grasshoppers, moths and other winged insects)
Class	INSECTA (true insects)
Subphylum	HEXAPODA (insects and other 6-legged organisms)
Phylum	ARTHROPODA (arthropods)
Superphylum	ECDYSOZOA (skin shedders)
Clade	Bilateria (bilaterally symmetrical animals)
Subkingdom	EUMETAZOA (metazoans)
Kingdom	ANIMALIA (animals)
Domain	Eukaryota (eukaryotes)
Life	BIOTA (living things)

Craesus septentrionalis is also a member of:
Invertebrates - Invertebrates (via Arthropoda)

NBN

NBN (data.nbn.org.uk) has a distribution map for Craesus septentrionalis (Hazel Sawfly, Birch Sawfly)

Craesus septentrionalis (Hazel Sawfly, Birch Sawfly) may be included in identification literature listed under the following higher taxa:

TENTHREDINIDAE
(a family of sawflies)

TENTHREDINOIDEA
(a superfamily of sawflies)

SYMPHYTA
(sawflies)

HYMENOPTERA
(ants, bees and wasps, sawflies and parasitoid wasps)

INSECTA
(true insects)

HEXAPODA
(insects and other 6-legged organisms)

ARTHROPODA
(arthropods)

ANIMALIA
(animals)

Eukaryota
(eukaryotes)

BIOTA
(living things)

Literature listed under the following higher taxa may be relevant to Craesus septentrionalis (Hazel Sawfly, Birch Sawfly):

TENTHREDINIDAE
(a family of sawflies)

TENTHREDINOIDEA
(a superfamily of sawflies)

SYMPHYTA
(sawflies)

HYMENOPTERA
(ants, bees and wasps, sawflies and parasitoid wasps)

PTERYGOTA
(bees, beetles, dragonflies, flies, grasshoppers, moths and other winged insects)

INSECTA
(true insects)

HEXAPODA
(insects and other 6-legged organisms)

ARTHROPODA
(arthropods)

EUMETAZOA
(metazoans)

ANIMALIA
(animals)

Eukaryota
(eukaryotes)

BIOTA
(living things)

Invertebrates
(Invertebrates)

Creative Commons License

This website is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Licence.

Unless otherwise expressly stated, all original material on the BioInfo website by Malcolm Storey is licensed under the above Creative Commons Licence.

BioInfo - Wildlife Information (UK)