## 1 Introduction  
In this study, we aimed to investigate natural means for spatial protection against mosquito bites and/or find new tools for surveillance purposes. Vector-borne diseases such as malaria, lymphatic filariases, schistosomiasisomiasis, leishmaniasis, onchocerciasis, trypanosomiasis, dengue, yellow fever and Japanese encephalitis, produce significant morbidity and mortality in humans and livestock, mostly in the developing world [1]. _Aedes aegypti_ (Diptera: Culicidae) is a primary vector, which transmit dengue, as well as, yellow fever, chikungunya, and Zika [2]. Dengue, sometimes causing a potentially lethal complication called severe dengue, is considered the most important mosquito-borne viral disease in the world today with about half of the world's population now at risk [3]. Vector control using pesticides plays an important role in preventing vector-borne disease. Synthetic pesticides are the major and important tools in controlling vectors and, accordingly, preventing diseases transmission. Although insect populations develop resistance to certain synthetic pesticides, they can have adverse effects on non-targeted species, and natural materials have been considered as potential tools for pest management [4]. Search for mosquito-attractive semiochemicals has been a subject of interest in the last few decades. New compounds or odor blends are regularly proposed as lures for odor-baited traps [5]. There are a few reports in the literature where sheep were used as bait for rift valley fever virus (RVFV) vectors [6; 7; 8]. Studies by [PERSON] et al. [7; 8] found that including sheep and other animal odors increases light trap catch of RVF virus mosquito vectors with U.S. Centers for Disease Control (CDC) light or CO\({}_{2}\); and the odor may be the primary factor for mosquito attraction. According to [PERSON] et al. [8], aldehydes: heptanal, octanal, nonanal, decanal, present in RVF virus hosts' odors, including sheep, could play an important role in the attractancy of RVF mosquitoes. [PERSON] at al. [9] studied the volatiles from Merino sheep wool samples collected by headspace SPME, and analyzed these by GC-MS-electroantennography; the samples containing octanal and nonanal possessed attractiveness to _Lucilia cuprina_ (Diptera: Calliphoridae) flies. The chemical composition of collected volatiles can be affected by various factors; e.g., [PERSON] et al. [10] using solid-phase microextraction (SPME) and GC-MS analysis of lamb fat samples, detected 6-methyl-2-heptanone and 2,5-dimethyl-4-hydroxy-3(2H)-furanone that were related to the time of grazing. [PERSON] et al. [11] using SPME with fiber coating--divinylbenzene-carboxen-polyddimethylsiloxane and GC-MS methods, investigated aldehydes, alcohols, ketones, phenols, indole, and sulfur compounds, and found that the ewe's diet strongly affected the volatile compounds profile of the cooked meat. According to [PERSON] et al. [12] bioassays during the lambing seasons confirmed the role of lamb odors in ewe-lamb recognition; they identified 133 volatile organic compounds in cranial wool of Dohne Merino lambs and found that the wool volatiles of twins are practically identical, but differ from those of other twins or non-twin lambs in the flock. The analysis of the headspace SPME volatile collection of a variety of scoured wool samples and greases using a carboxen-polydimethylsiloxane coated fiber, by a GC-MS and GC/pulsed flame photometric detector, showed the number of volatiles decreased after various stages of wool scouring [13]. Sheep wool is an agricultural waste produced by sheep breeding; it is a renewable, recyclable and environmentally friendly material, used in many fields and sectors, offering significant benefits for sustainability [14]. Wool fiber decomposition does not pose a risk to the environment and may even be used as a plant fertilizer [15]. Along with other advantages, sheep wool is attractive as an odor source because of its low cost.