Just a quick note on aging Brant in the field . . .
In this photo we have 2 adult Brant (the two birds on the left) and one first cycle Brant. While their overall appearance
is similar it is an easy species to age with a decent look. Notice the white tips to the secondary coverts on the first cycle.
The white neck-ring is also reduced in first cycle birds.
Notice the patterned appearance of the first cycle and the plain-winged appearance of the adults.