Environment, Birds, Oceanography, Habitats, Analysis, Animal populations, Zoology, Foraging behavior, Microbiology, Freshwater & Marine Ecology, Animal reproduction, Marine & Freshwater Sciences, Cormorants
Ecology, Territory, Conservation of Natural Resources - methods, Life Sciences, Plant Sciences, Population density, Prey density, Canis lupus, Homing Behavior - physiology, Wolves - physiology