|[Note Guidelines] Photographer's Note|
|Class: Hexapoda |
Species: Peleteria iavana
Tachinidae is a large and rather variable family of true flies within the insect order Diptera, with more than 8,200 known species and many more to be discovered. There are over 1300 species in North America. Insects in this family are commonly called tachina flies or simply tachinids.
They occur in almost all habitats all over the world. There are Neotropical, Nearctic, Afrotropical, Palaearctic, Oriental, Australasian and Oceanic species.
Larvae (maggots) of most members of this family are parasitoids (they develop inside a living host, ultimately killing it), and a few are parasitic (they do not kill the host). They are endoparasites (internal parasites) of caterpillars of butterflies and moths, adult and larval beetles, sawfly larvae, various types of true bugs and grasshoppers, and (rarely) centipedes, with usually only one grub. Only a few species are restricted to one host species. As such, many are important natural enemies of major pests. Some species are being used in biological pest control. Many important pests are suppressed by tachinids. Many species of tachinid flies have been introduced into North America from their native lands as biocontrols to suppress populations of alien pests.
Certain tachinid flies are, however, regarded as pests by silkworm rearers. One particularly noted silkworm pest is the Uzi fly (Exorista bombycis).
Reproductive strategies vary greatly between species. The female may lay white oval eggs on the skin of the host insect, or insert eggs into the host's body, or leave them in the host's environment, as for example on leaves, where the host will ingest them. Some tachinids that are parasitoids of stem-boring caterpillars deposit eggs outside the host's burrow, letting the larvae do the work of finding the host itself. In other species, the maggots use an ambush technique, waiting for the host to pass and then attacking it and burrowing into its body. The larvae feed on the host tissues.
Tachinid flies are extremely varied in appearance. Adult flies may be brilliantly colored and then resemble blow-flies (family Calliphoridae), or rather drab, and then resemble house flies. But tachinid flies are more bristly and more robust. They have three-segmented antennae, a diagnostically prominent postscutellum bulging beneath the scutellum (a segment of the mesonotum), and bare (sometimes plumose) arista. The calypters (small flaps above the halteres) are usually very large. Their fourth long vein bends away sharply.
Adult flies feed on flowers and nectar from aphids and scale insects. As many species typically feed on pollen, they can be important pollinators of some plants, especially at higher elevations in mountains where bees are relatively few.
The taxonomy of this family presents many difficulties. It is largely based on morphological characters of the adult flies, but also on reproductive habits and on the immature stage.
livius, maurydv, Argus, zetu, marius-secan has marked this note useful
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- [2010-09-12 1:15]
Ciao Melania,una macro spettacolare con dei dettagli impressionanti,si possono contare i peli ad uno ad uno.Complimenti anche per l'identificazione,io ne ho un paio piu' o meno simili e da giorni ne cerco il nome senza successo..ehehe....complimenti e buona Domenica,LUCIANO
Fantastic close up Melania! Great warm colors and briliant dept of field! Bravo!
- [2010-09-12 2:40]
macro veramente di alto livello, per dettagli, colori e gestione della luce. La profondità di campo è stata veramente gestita molto bene dando un ottimo risultato anche nell'incorniciare i piccoli fiori. Buona Domenica
Ciao Melania. Con foto così ho parli per un'ra elogiandole o ti fermi e constati: E' PERFETTA. Siccome è domenica e vado un po' di fretta opto per la seconda opzione.
macro di altissima qualità, forse avresti potuto spingere sulla chiusura del diaframma per ottenere una maggiore profondità, ma probabilmente la coppia tempo-diaframma è frutto di una tua scelta compositiva per una messa a fuoco selettiva, dettagli sbaloridtivi e splendid colori naturali.
Grazie e complimenti
- [2010-09-12 6:57]
A top class macro of this species of Tachinid Fly. The lateral POV shows its features with excellent sharpness, DOF and colours against a clean BG in a pleasing composition.
Thanks and have a good week,
Ciao Melania, sotto la tua lente anche il più insignificante degli insetti diventa un piccolo capolavoro, fantastici dettagli, si fa con esattezza il censimento dei peli, splendida nitidezza e magnifici colori, bravissima, ciao Silvio
- [2010-09-12 9:50]
Excellent macro work. Thanks for sharing
Superb capture with outstanding details and wonderful colours.
Amazing focus and sharpness. It is a lovely composition in a good light.
Super sharp and detailed, excellent colours, very good composition, POV and blurred BG. Well done!
Mira que son feas las moscas y lo molestas que son, pero que foto más buena has sacado de ella y todo el conjunto de la imagen, que ha quedado realmente perfecta. Una composición fuera de serie, y con perfecta nitidez.
Un saludo de Antonio