It is not all that uncommon for birds to get in the squirrel/rat trap; they are released as soon as we find them (a matter or minutes or hours).
In two days recently, B caught four cardinals. What is remarkable about this is that each time, there were two cardinals caught in the cage!
It is even possible that it was the same pair each time. We have a LOT of cardinals and I am thinking the gene pool may not be quite large enough!
I told him if he caught two more the next day, he had to go buy a lottery ticket!