Interesting Fred....I have not heard this.....I know where we're shooting pigeons & Euros they could possibly catch them via net, but they'll never come close to catching them all.....Net guns aren't cheap to use either.
Euros have had the perfect storm in the IV for a long time.....The feed lots for the most part have now disallowed hunting/shooting.....There are 1000's in these feet lots. With the majority of the birds living in the cities & feeding in the feed lots.....Again, hard place to catch.