The screaming on most rollercoasters begins almost as soon as anticipation of the stomach-churning descent begins. Even in the dark we know that we are plummeting from the instant we tip over the summit, and the secret of the thrill lies deep in gravity sensors in our inner ears and intestines. As soon as the descent is launched and we begin free falling, the effect of gravity on the sensors is...

a faunistic list of syrphidae sampled in the agroecosystems of neyshabur (khorasan-razavi province) through malaise, yellow water traps and hand net is hereby presented for the first time. a total of 22 species were collected, including 13 species through malaise trap, 5 through yellow water trap as well as representatives of all species sampled through hand net. among the species collected, 8 ...

a survey was conducted on the fauna of the hover flies in northern iran in 2011. among the collected and identified material, the genus temnostoma le peletier & serville, 1828represented by a single species, t. vespiforme (linnaeus, 1758) is newly detected in iran. diagnostic characters and geographical distribution of the newly recorded species is briefly discussed.

a survey on the hover flies (diptera: syrphidae) fauna of northern iran, between 2010 and 2011, led to the discovery of the species pipiza accola violovitsh, 1985. both the genus and species are newly recorded from iran. all the specimens were collected from gilan and mazandaran provinces, using malaise traps. the diagnostic characters of p. accola and its geographical distribution is presented.

Platycheirus shantar sp. n. is described and illustrated from Khabarov¬sky krai in Russia. The holotype of new species deposited the Federal Scientific Center East Asia Terrestrial Biodiversity, Vladivostok, An annotated list 41 hover-flies discovered Bolshoi Shantar Island given; almost all them are recorded this island for first time.

Amphoterus Bezzi, 1915 is a genus of rarely collected Afrotropical hover flies (Diptera, Syrphidae). We present the first description female A. braunsi van Doesburg, 1956, redescribe males 1956 and cribratus 1915, describe new species, londti sp. nov. also provide colour photographs two DNA barcodes for key to identify species.

A firm understanding of how fruit flies hover has emerged over the past two decades, and recent work has focused on the aerodynamic, biomechanical and neurobiological mechanisms that enable them to manoeuvre and resist perturbations. In this review, we describe how flies manipulate wing movement to control their body motion during active manoeuvres, and how these actions are regulated by sensor...

pollination and pest control are perhaps the best-known ecological services performed by hover flies. the species diversity and their abundance have an influential impact on the ecological services provided by this family. to find out species diversity of adult flower flies associated with agroecosystems in kerman province, a biodiversity survey using insect net and color water traps was conduc...