The November cover of Journal of Avian Biology shows an adult Common loon (Gavia immer) with its chick from the paper 'Common loon parents defend chicks according to both value and vulnerability'

You can access the paper here: http://onlinelibrary.wiley.com/doi/10.1111/jav.00648/abstract

Photo by: Linda Grenzer

Download high resolution file: jab_46_06_cover.pdf