OPB SpecialsThe Silent Invasion Special | 58m 57s Something troubling is taking hold in Oregon. Strange, exotic plants and animals are showing up in places where they don't belong. They are invasive species, and they're taking over landscapes, driving native wildlife away, and making everyone from ranchers to fishermen to wildlife managers nervous. What are these invaders? Where do they come from? And what can we do to stop them? Aired: 04/22/08 Rating: TV-G Closed CaptioningVideo has closed captioning.Buy Now:PBSBuy DVDs checkmarkAdd to WatchlistProblems Playing Video?Report a ProblemClosed CaptioningShare:Share this video on FacebookFacebookShare this video on TwitterTwitterShare this video on Google PlusGoogleShare this video via EmailE-mailEmbedEmbed Code for this videoEmbed CodeOPB SpecialsThe Silent InvasionWidth in pixels px Height in pixels px Copied to your clipboardUnable to copyLabelCopy to ClipboardClick to copy embed code for videoCloseCloseReport a ProblemBefore you submit an error, please consult our Troubleshooting Guide.Type of ErrorVideo doesn't loadVideo loads, but doesn't playVideo jumps back/forwardOnly audio is streamingSponsorship playback errorOtherPlease add more detailsCancelSubmit ReportYour report has been successfully submitted. Thank you for helping us improve PBS Video.CloseCloseClose Learn More DownEpisode Links Prevention Tips Faces of InvasionFunding for The Silent Invasion provided by Barbara Coit Yeager, Coit Family Foundation, Willard L. Eccles Charitable Foundation and Oregon Watershed Enhancement Board.