Tykki Duw

Hweskeren gans eskelli liwus ow longya dhe'n urdh Lepidoptera yw tykki Duw (dhyworth tegen Dhuw). Wosa gori a'n oy, tykki Duw yw pryv del a dheber meur a dhel, ha a janj dhe hwiler (chrysalis) kyns dos yn mes a'n hwiler wosa nebes seythennow gans eskelli. 

250px|skeusennik|Gwennolek (Papilio machaon):A- Askell a-rag B- Tavell C- lagas komplek D- Sugnor E- Thoraks F- Garr G- Torr H- Askell war dhelergh I- Lost

Yn fenowgh, yma dhedha eskelli liwus, meur. Y'n bagas ma kevys yw tykkiow Duw (ughdeylu an Papilionoidea), an pennogyon (ughdeylu Hesperioidea) ha'n godhanes - tykkiow Duw (ughdeylu Hedyloidea). Skant yw an niver a venhesennow, drefen bos aga eskelli mar danow ha hedor, mes prederys yw an urdh dhe esplegya nans yw 40-50 milvil bledhen. 

Nebes tykkiow Duw a dhivro, h.y. ow vyajya milyow a vildiryow dres an hav; rag ensampel, an myghtern (egh. Danaus). Drefen aga gallos dhe janjya dhyworth unn studh dhe studh aral, ha drefen tekter aga liwyow ha'ga neyj, imach gerys da yns i yn lien hag artys erel. Konsidrys yw nebes anedha avel pla drefen i dhe dhybri losow kegin. Tro aral, aga freves del a dheber eghennow erel konsidrys avel pla aga honan. 

Hwithrans re dhiskwedhas leheans yn niveryow a 71% a eghennow tykkiow Duw yn Breten Veur a-dhia 1983 dhe 2003. 

Eghennow yn Kernow
skeusennik|250px|right|Gwydhyow gans 'Cyfoeth Naturiol Cymru' a Vrith an Gors
Eghennow a dykkiow Duw a welir yn Kernow a gomprehend an re a sew:	
 Argus gell (Aricia agestis: Brown Argus)
 Losek (Hipparchia semele: Grayling)
 Lost an golm (Macroglossum stellatarum: Hummingbird Hawkmoth)
 Porther (Pyronia tithonus: Gatekeeper)
 Brith arghans (Argynnis paphia: Silver-washed Fritillary)
 Brith gell (Argynnis adippe: High brown Fritillary)
 Brith duwer (Argynnis aglaja: Dark Green Fritillary)
 Brith an gors (Euphydryas aurinia: Marsh Fritillary)
 Brith Glanville (Melitaea cinxia: Glanville Fritillary)
 Brith an ros (Melitaea athalia: Heath Fritillary)
 Lostek du (Satyrium pruni: Black Hairstreak)
 Lostekn gell (Thecla betulae: Brown Hairstreak)	
 Lostek gwynn (Satyrium w-album White letter Hairstreak) 
 Lostek gwer (Callophrys rubi: Green Hairstreak)
 Brith perlek (Boloria euphrosyne: Pearl-bordered Fritillary)
 Brith perlek byghan (Boloria selene: Small Pearl-bordered Fritillary)
 Burnet hwegh namm (Zygaena filipendulae: Six-spot Burnet)
 Kober byghan (Lycaena phlaeas: Small Copper)
 Glesek bras (Phengaris arion: Large Blue)
 Glesek byghan (Cupido minimus: Small Blue)
 Glesek kemmyn (Polyommatus icarus: Common Blue)
 Glesek sterennek (Plebejus argus: Silver-studded Blue)
 Glesek an kelyn (Celastrina argiolus: Holly Blue)
 Glesek an krey (Lysandra coridon: Chalkhill Blue)
 Glesek Adonis (Lysandra bellargus: Adonis Blue)
 Kosek brith (Pararge aegeria: Speckled Wood)
 Gellek an kylgh (Coenonympha tullia: Common Ringlet)
 Gellen an keow (Lasiommata megera: Wall Brown)
 Gellek an pras (Maniola jurtina: Meadow Brown)
 Pennek byghan (Thymelicus sylvestris: Small Skipper)
 Pennek malow (Pyrgus malvae: Grizzled Skipper)
 Pennek loos (Erynnis tages: Dingy Skipper)
 Gwynnek bleyn rudhvelyn (Anthocharis cardamines: Orange Tip)
 Gwynnek an koos (Leptidea sinapis: Wood White)
 Gwynnek byghan (Pieris rapae: Small White)
 Gwynnek bras (Pieris brassicae: Large White)
 Gwynnek gwithi gwyrdh (Pieris napi: Green-veined White)
 Askellek (Vanessa cardui: Painted Lady)
 Komma (Polygonia c-album: Comma)
 Amyral rudh (Vanessa atalanta: Red Admiral)
 Amyral gwynn (Limenitis camilla: White Admiral)
 Lagas payon (Inachis io: Peacock)
 Melyn an ravnen (Gonepteryx rhamni: Common Brimstone)
 Yar vyghan an linas (Aglais urticae: Small Tortoiseshell)
 Halek bras (Coenonympha tullia: Large Heath)
 Halek byghan (Coenonympha pamphilus: Small Heath)
 Emperour purpur (Apatura iris: Purple Emperor)
 Loosvelyn gwynnik (Colias hyale: Pale Clouded Yellow'')

Kylghres bewnans

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Klass:Hwesker