I think poultry are excluded by the title ("land mammals"). If they were there, it appears[1] they should be about equivalent to the total biomass of sheep. [1

I think poultry are excluded by the title ("land mammals"). If they were there, it appears[1] they should be about equivalent to the total biomass of sheep. [1]: https://www.pnas.org/doi/full/10.1073/pnas.1711842115 https://www.pnas.org/doi/full/10.1073/pnas.1711842115