Would they be roughly equivalent to a bird strike?
Depends on the bird
. Having a Google ( as you do
) I see that these seemingly easily available drones:...
Overview of our drones - Height Tech Gm
are somewhat more massive than your "**** me, I don't want to fly into you" Common Buzzard, which weighs in at a mere 1.3 kg max ....roughly 3 lbs in old money....
I'll let you draw your on conclusions, but personally I wouldn't want to collect a flesh, feather and blood 1.3 kg Buzzard, so as for a 2.5 kg drone...........
Small unmanned aircraft systems (UAS) are UAS that are 55lbs or less.
Yikes,
a suitcase weighing 55 lbs suitcase would be on the verge of triggering overweight charges on many airlines.......