|Species||Spanish Fighting Bull|
|Born||Seville, Andalusia, Spain|
|Known for||Gored and killed Manolete|
|Owner||Eduardo Miura Fernández|
Islero had poor eyesight and tended to chop with his right horn. On the fateful day, he was the fifth bull of the afternoon, and the second for Manolete, at a bullfight in the town of Linares in the province of Jaén, Andalucía, Spain. The bullfighter's manager begged Manolete to finish him off quickly; as the matador reached over the bull's horns, thrusting his estoque (sword) deep up to its hilt, Islero thrust his right horn into Manolete's groin, severing his femoral artery. The bullfighter was rushed to hospital, but died on the operating table later that evening.
The Spanish project to build nuclear weapons was named Proyecto Islero.
- ""The Death of Manolete"". Geocities. Yahoo!. Archived from the original on 20 March 2008. Retrieved 28 August 2019.
- P. Benavente, Rocio (13 November 2016). "Proyecto Islero, la bomba atómica que España pudo tener durante el franquismo". El Confidencial (in Spanish). Titania Compañía Editorial, S.L. Retrieved 28 August 2019.