![]() ![]() It is not impossible that Seitz has shown a machaon of northern origin. On the hindwings the yellow discal zone of Swedish machaon takes up almost 10mm of the space beyond the cell, even more extensive than is shown in the magnificent illustration in SEITZ, Plate 6c. (Gorganus, brother of Machaon) is not only significantly smaller than the Swedish nominate form but also characterised by the yellow cell spot, which is barely half the width, and the yellow region of the forewing, which is up to one third narrower. Ein ♀, das mit SPULERS Figur in der Enge der gelben Binde harmoniert, besitze ich aus Holland.Īs a commentary on this - which is almost superfluous - it should be noted that P. Eine weniger breite Gelbzone der Hinterflügel zeigt schon das Bild REBELS im BERGE, ein sehr schmales das Bild von SPULER. Es ist nicht ausgeschlossen, daß Seitz einen machaon nordischer Herkunft vorgeführt hat. Auf den Hinterflügeln nimmt die gelbe diskale Zone bei schwedischen machaon jenseits der Zelle einen fast 10 mm breiten Raum ein, noch ausgedehnter als sie auf der prächtigen Abbildung im SEITZ, Taf. (Gorganus, Bruder des Machaon) nicht nur bedeutend kleiner als die schwedische Nominatform bleibt, sondern auch durch kaum halb so breiten gelben Zellfleck und die um ein Drittel schmälere gelbe Region der Vorderflügel charakterisiert wird. ![]() britannicus is slightly smaller than ssp. gorganus, the submarginal bands are triangular, being wider at base of the wings and narrower at the apex, while this band is not so tapered in ssp. gorganus a lighter appearance, although this difference is disputed by Cooke (1946). Ford (1945) states that the ground colour is of a deeper yellow, giving ssp.Ford (1945) states that, on the hindwing, the submarginal band, marked with blue, extends nearer to the dark mark at the end of the cell.The submarginal bands are particularly broad and dark in comparison. ![]() In terms of appearance, this subspecies differs from its European counterpart, ssp. Dennis (1977) suggests that this is genetically controlled since, according to Gardiner (1963), "A day-length of 18 hours does not prevent diapause in P. britannicus is a fenland butterfly, its main foodplant is Milk-parsley ( Peucedanum palustre) and it is mainly univoltine, with only a small percentage of adults going on to produce a second brood. gorganus not only in terms of its appearance but also its ecology. This subspecies is indigenous to the British Isles and differs from ssp. This subspecies was first defined in Seitz (1907) as shown here and as shown in this plate ( type locality: Norfolk, England). On April 14th 2014 a single continental Swallowtail was seen and photographed at the Magdalen Hill Down Butterfly Conservation reserve near Winchester in Hampshire. These sightings included evidence of egg-laying and the resulting larvae and pupae have been followed through to spring 2014. 2013 was an exceptional year for this subspecies, with sightings from 13 sites across Hampshire, Sussex and Kent, and a single site in Buckinghamshire. This subspecies is less fussy and will use many kinds of Umbellifer, such as Wild Carrot, as the larval foodplant. In some years, there are reports of the gorganus subspecies arriving from the continent. Seeing the adult butterflies flying powerfully over the Norfolk Broads is a sight to behold, and one near the top of the list of most British butterfly-watchers. This is partly due to the distribution of the sole larval foodplant, Milk-parsley. The British race is the subspecies britannicus which is confined to the fens of the Norfolk Broads in East Norfolk. This spectacular insect is our only resident butterfly of the Papilionidae family, which is one of the largest butterfly families in the world. The Swallowtail is our largest native butterfly, and also one of our rarest.
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