The study concerns images of vibrating spermatozoa in the ejaculation of buffalo bulls from Bulgarian murrah breed through the method of Tchakarov and Natchev [1962]. obtained at 5 sec exposures. optimal for this particular species. The negative registration material has been developed with high-equalising developer by Windisch. https://www.roneverhart.com/Dynarex-WeCare-Vitamin-A-D-Ointment-Skin-Protectant/