DESCRIPTION
cornīx scorpium rapuit = "a crow caught the scorpion" : "you bit off more than you can chew"
cornīx = a crow (note that European crows are GREY and black, not all black like in North America)
scorpius = scorpion
rapiō rapere rapuī raptum = to seize, to steal
ēsse = to eat
venēnō venēnāre = to poison
Composition practice for you:
Imagine your own examples in an original context, and write them below!