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High-tech drones are flying to the approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of tortoises in California's Mojave Desert. The desert tortoises in the approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern Mojave are under approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of being wiped out by ravens. The raven is a approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern version of the crow. Its population in the Mojave has increased by approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern than 700 per cent in the past 25 years and this is having a approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern impact on the desert tortoises. Allison Fedrick, a approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern conservationist, observed that in some places, "where there used to be 10 ravens, there are now 15,000". Ms Fedrick noted that if approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern was done to help the tortoises, they would be approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern wiped out. Their approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern have plummeted by more than 90 per cent since 1990.

Technology is coming to the approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of the tortoises. A approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of biologists and drone operators has come up with a strategy to reduce the raven approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern. They are using drones and the use of the approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of "egg oiling". This involves flying drones up to the ravens' approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern, removing fertilized eggs, coating them with a approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern of corn oil, and then replacing them. The oil blocks approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern from entering the egg, effectively ending the life of the approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern inside. Biologist Mercy Vaughn said: "If ravens figure out that their eggs are approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern, they are likely to eat them and nest someplace else." Conservationist John Griffin said oiling was justified as "part of a comprehensive approachcatastrophiccompletelydefenceembryofilmlargerlocalmethodmorenestsnothingnumbersoxygenpopulationrescuerottenteamthreatwestern that...addresses all other factors".