CountryfileShortsEpisode 15: Burnham BeechesBBC One Duration: 5 minutesFirst broadcast: Tue 28th Feb 2017, 13:50 on BBC Two EnglandLatest broadcast: Sun 11th Mar 2018, 11:30 on BBC Two WalesJulia Bradbury is at Burnham Beeches on the hunt for giant wood ants with an unusual defence mechanism which lead to the discovery of formic acid.ContributorsPresenter:Julia BradburyGenresFactualScience & NatureFactualScience & NatureNature & EnvironmentFormatsMagazines & ReviewsBrandCountryfileSeriesCountryfile: Shorts Source: BBC Online