In fact, the iim7, V7 progression ("two-five," as it's commonly known) - sometimes followed by the tonic chord ("two-five-one") - is probably the most important progression in jazz.
Easy to see why you got your "name", BirdMusic!! Lovely.
Whatever it was - frog or lizard - it is now "brown bread" (Cockney rhyming slang = dead). Gotta say it is just a tad nervous-making, seeing them flapping around on that cliff-face! When they fledge, they better FLEDGE!
We are now watching for this ourselves here in Ireland. It looks so dreadful on the poor creatures. And as migration season begins, who knows where the spread could go. Add that to a disease which is affecting our finches, and this does not bode well.