Usually the first to appear are flocks of males where they fight and sqabble over the oranges and orange flavored suet cakes.
Individual birds prefer different food. Some fight over a certain orange half while others perfer the suet. Here you can see the tongue of this male savoring the sweet juice of the orange.
The females are a lot less colorful and come in a couple of days later than the males.
They seem to enjoy the oranges more than the suet and prefer to perch above the fruit to eat.
Many times they will not land on the suet to eat, but will fly to it and sally there until they get a piece. Then they will fly to a branch to eat and clean off their bill by rubbing it on the bark.
I love trying to catch them in flight as they eat and put on a show for me.