Great crested grebe, (Podiceps cristatus), two rival males in territorial dispute, on lake, Lower Saxony, Germany
Size: 4896px × 3264px
Photo credit: © Duncan Usher / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: aggressive, behavior, breeding, crested, defensive, dispute, great, grebe, lake, males, rival, rivalry, territorial, territory, threatening