Look at this https://twitter.com/EmbassyCat/status/801846774059114496 , people are theorising that this is referencing to a dead Canery , a Canery was used to scope the coal mines, if it entered the mines and died, it was time to leave.

http://subverse.net/interesting/dead-canary-wikileaks-staff-email-server-riseup-may-be-compromised/

Read up on that. If you stumble across incriminating evidence, DO NOT POST IT ANYWHERE UNLESS YOU KNOW YOU ARE SAFE! Use external hard drives, give a couple to TRUSTED!!! friends and tell them NOT TO TELL ANYONE! OR safer route, tell them to BURY the usb in a case in a very discreet location secluded from their regular routine AND ONLY return to that area when they know they are safe and not being followed as breaks in routines are used to track people when getting information!