Can You Identify These Grassland Birds?

Mystery Bird #1
This little bird on the prairie may remind you of a miniature meadowlark with its black V on a yellow breast. The summer of 2017 is shaping up to be an interesting one for these birds, as they are turning up in areas outside their core breeding range in the Midwest. Now is a great time to check your local grasslands and weedy fields for these colorful (and vocal) birds.

a) Prairie warbler
b) Lark sparrow
c) Dickcissel
d) Lesser goldfinch