![]() The dry-season forms are usually more cryptic, perhaps offering better camouflage when vegetation is scarce. Many butterflies have on the wings these too may deflect attacks, or may serve to attract mates.Auditory defences can also be used, which in the case of the refers to vibrations generated by the butterfly upon expanding its wings in an attempt to communicate with ant predators.Many tropical butterflies have for dry and wet seasons. These may also cause ambush predators such as spiders to approach from the wrong end, enabling the butterflies to detect attacks promptly. Since it usually occurs in species with low population density, it is assumed these landscape points are used as meeting places to find mates.Butterflies use their antennae to sense the air for wind and scents. In many species, this behaviour is restricted to the males, and studies have suggested that the nutrients collected may be provided as a, along with the spermatophore, during mating.In, males of some species seek hilltops and ridge tops, which they patrol in search for females. Some butterflies also visit dung, rotting fruit or carcasses to obtain minerals and nutrients. ![]() Several species of butterflies need more sodium than that provided by nectar and are attracted by sodium in salt they sometimes land on people, attracted by the salt in human sweat. ![]() They sip water from damp patches for hydration and feed on nectar from flowers, from which they obtain sugars for energy, and and other minerals vital for reproduction. Has been observed for at least one species of butterfly.Adult butterflies consume only liquids, ingested through the proboscis. Butterfly eggs vary greatly in size and shape between species, but are usually upright and finely sculptured. Each egg contains a number of tiny funnel-shaped openings at one end, called micropyles the purpose of these holes is to allow sperm to enter and fertilize the egg. ![]() This is lined with a thin coating of wax which prevents the egg from drying out before the larva has had time to fully develop. A butterfly laying eggs underneath the leafButterfly eggs are protected by a hard-ridged outer layer of shell, called the chorion. In the genera, and Parnassius, a small number of species are known that reproduce when the female dies, a partially developed larva emerges from her abdomen. The male passes a to the female to reduce sperm competition, he may cover her with his scent, or in some species such as the Apollos ( ) to prevent her from mating again.The vast majority of butterflies have a four-stage life cycle, (caterpillar), (chrysalis) and (adult). Simple photoreceptor cells located at the genitals are important for this and other adult behaviours. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |