Ukraine's armed forces say Russia has lost more than 680 tanks within the two months since the invasion began.
And on top of that, Oryx - a military and intelligence blog - suggests Russia has lost more than 2,000 other armoured vehicles.
Military experts put the losses down to the advanced anti-tank weapons western nations have given to Ukraine, and to the poor way Russia has used its tanks.
How great are Russia's tanks losses?
Ukraine's armed forces say Russia has lost more than 680 tanks.
Meanwhile, Oryx - a military and intelligence blog which counts Russia's military losses in Ukraine on the basis of photographs sent from the warzone - says Russia has lost more than 460 tanks and over 2,000 other armoured vehicles.
According to the Rand Corporation and the IISS, Russia had about 2,700 main battle tanks in its attack force at the start of the conflict.
