EditorialMauro Antonio Nieto Acosta, left, and Dereck Alejandro Morín, both veterinary students, deliver anti-parasite medication to a young horse at an RVETS clinic in the community of Charco de Sierra in the state of Guanajuato, Mexico, on April 14, 2023. (Victor J. Blue/The New York Times)
EditorialMauro Antonio Nieto Acosta, left, and Dereck Alejandro Morín, both veterinary students, deliver anti-parasite medication to a young horse at an RVETS clinic in the community of Charco de Sierra in the state of Guanajuato, Mexico, on April 14, 2023. (Victor J. Blue/The New York Times)
EditorialMauro Antonio Nieto Acosta, left, and Dereck Alejandro Morín, both veterinary students, deliver anti-parasite medication to a young horse at an RVETS clinic in the community of Charco de Sierra in the state of Guanajuato, Mexico, on April 14, 2023. (Victor J. Blue/The New York Times)
EditorialPolistes, Print, Wasps of the cosmopolitan genus Polistes (the only genus in the tribe Polistini) are the most familiar of the polistine wasps, and are the most common type of paper wasp in North America. It is also the single largest genus within the ...