Eight members of a pride of lions that featured in a popular wildlife documentary series have been poisoned in Kenya's Masai Mara reserve. Two of the Marsh Pride lions - stars of the BBC's long-running Big Cat Diary series - died after eating a poisoned cow carcass on Saturday night, while one more is missing and at least five are being treated by vets.Jonathan Scott, a zoologist and one of the show's original presenters who has been following the Marsh Pride for nearly 40 years, lamented the "end of an era".Among the dead lions was 17-year-old female Bibi, who had become something of a celebrity during the TV series' hugely popular run from 1996-2008.A BBC wildlife crew said Bibi was found "lying on her side, foaming at the mouth, fitting and panting" before she died.Conservationists noticed something was wrong on Sunday when some of the lions, "were collapsing and suffering from spasms", according to the David Sheldrick Wildlife Trust.Cattle herders who bring their animals into the Masai Mara National Reserve to graze are suspected of the poisoning."Tens of thousands of cattle encroach into the reserve every night when visitors are safely out of sight," said Scott.The grazing cattle are hunted by lions, bringing the herders into conflict with the cats."There is nothing shocking any more as to what is happening in the Masai Mara," he added, blaming years of "appalling management" by local authorities.Two men were due to be charged with poisoning the lions yesterday, and face a maximum 20-million shilling (R2.7-million) fine or life imprisonment if found guilty.Safari expert Brian Jackman named the pride when he co-wrote the book The Marsh Lions, which formed the basis of the TV series. ..