Scouting For a Deal

In the past two winters I have had a number of visits by Red Winged Blackbirds, sometimes in single numbers and sometimes in enormous numbers.  It always seems to be male birds, and usually young males (with the yellow, not red, wing flashes)  who are no doubt scouting forage opportunities available to less senior birds.  Or such is my assumption.  There is a significant pond nearby that provides ample nest and food opportunities in the warm months.  Hence I am pondering whether this junior male will find a good deal and telegraph that to his friends.  That definitely happened last year when the bird count mounted, in a Fibonacci series, up to nearly 100 blackbirds.  I've made some feeder changes to discourage larger birds.  We shall see if those countermeasures are effective.