While corvids can use tools, I think they'd probably struggle with a pair of wire cutters

Well we've used pigeons fr missile guidance before [0], and for messaging [1], so birds have a firm place in the military including having their own special units [2]

More generally, the history of warfare is all about taking the enemy's resources and using them as weapons against the foe. This will be a defining feature of future cyberwar and AI - everything we build to "protect ourselves" will at some point be repurposed to advantage an enemy.

[0] https://en.wikipedia.org/wiki/Project_Pigeon

[1] https://en.wikipedia.org/wiki/War_pigeon

[2] https://warfarehistorynetwork.com/article/warfares-unsung-pi...

Dolphin's were trained to bypass enemy underwater defenses to plant explosives on enemy ships while they were in there home port. They were also used to find mines and other underwater devices to be disarmed.

Most birds just aren't big enough to do real damage to barbed wire or razor wire defenses. Now if you could somehow train the birds to harass a herd of cattle into running down the fence, that might work. Sort of like the Hitchcock movie The Birds.

Cockies would gladly do the job for free. https://www.reddit.com/r/australia/comments/rga3pf/cockatoo_...