sparrow tag concept

After being bored out of my mind I had this idea of sparrow tag. Sparrow tag would be much like tips but on sparrows and in a dedicated area. Judges would judge whether or not someone has been tagged and who is in. losers will be eliminated after still being in after a certain period of time OR being in at the end of a set time period (these could be two different game modes or the same one). Games would start with 4-6 players and one would be eliminated every round until one person is left who would be declared the winner. The person starting in would be chosen from everyone trying To guess a random number between 1 and 10 (person who GUESSES the number is in) then people who are not in would be given 10 seconds to run away in the designated area. If anyone manages to fall off their sparrow they are automatically in. I hope this is fun as it sounds in my head!