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The female can reach, and slightly exceed, a wingspan of 25 to 28 cm (10 to 11 in), a body length of 8 cm (3.1 in) and a body mass of up to 12 g (0.42 oz), all enormous measurements for a butterfly. The female has brown wings with white markings arranged as two rows of chevrons.
Female: typical of birdwing butterflies, Ornithoptera croesus is strongly sexually dimorphic. Females are larger than males and have brown wings marked with lines of yellow chevrons. Females are larger than males and have brown wings marked with lines of yellow chevrons.
Butterfly mating systems have great variation, including strict monandry, one male and one female, to polyandry, having many mates of the opposite sex. Typically Ornithoptera tend to be polygamous , mating with more than one individual.
Males have a predominantly black upper wing with emerald green flashes, however the female lacks the green colouring, having a plain black upper wing with white patches. The female is the larger of the two sexes. There was a spectacular and rare genetic mutation of this butterfly, where single aberrant female produced less than 40 aberrant progeny.
Butterfly adults are characterized by their four scale-covered wings, which give the Lepidoptera their name (Ancient Greek λεπίς lepís, scale + πτερόν pterón, wing). These scales give butterfly wings their colour: they are pigmented with melanins that give them blacks and browns, as well as uric acid derivatives and flavones that ...
The body of an adult butterfly or moth (the imago) has three distinct divisions, called tagmata, connected at constrictions; these tagmata are the head, thorax, and abdomen. Adult lepidopterans have four wings – a forewing and a hindwing on both the left and the right side of the thorax – and, like all insects, three pairs of legs. [11]
The female's wings are fully opened with the tips below the horizontal. In addition, the abdomen is elevated to 45-60 degrees above the body axis and the genitalia are extruded. [ 12 ] This rejection posture has often been misconstrued as an invitation to mating, as other butterflies such as the Heliconius use it to attract mates.
The holly blue has pale silver-blue wings spotted with pale ivory dots. Seitz describes it "Male above shining violet blue, only the apical portion of the costal margin being minutely edged with white. The female has both wings broadly bordered with dark, the margin of the hindwing bearing vestiges of ocelli.