Piscivorous in the context of "Waterbird"

Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals, reptiles and smaller birds). In addition to speed and strength, these predators have keen eyesight for detecting prey from a distance or during flight, strong feet with sharp talons for grasping or killing prey, and powerful, curved beaks for tearing off flesh. Although predatory birds primarily hunt live prey, many species (such as fish eagles, vultures and condors) also scavenge and eat carrion.

Although the term "bird of prey" could theoretically be taken to include all birds that actively hunt and eat other animals, ornithologists typically use the narrower definition followed in this page, excluding many piscivorous predators such as storks, cranes, herons, gulls, skuas, penguins, and kingfishers, as well as many primarily insectivorous birds such as nightjars, frogmouths, and some passerines (e.g. shrikes); omnivorous passerine birds such as crows and ravens; and opportunistic predators from predominantly frugivorous or herbivorous ratites such as cassowaries and rheas. Some extinct predatory telluravian birds had talons similar to those of modern birds of prey, including mousebird relatives (Sandcoleidae), and Messelasturidae indicating possible common descent. Some Enantiornithes also had such talons, indicating possible convergent evolution, as enanthiornithines are not considered to be true modern birds.

Hucho is a genus of large piscivorous salmonid fish known as taimens (from Finnish taimen, 'trout', through Russian: тайме́нь, romanized: taĭménʹ), and is closely related to Pacific trout and lenoks (all belonging to the same tribe in the subfamily Salmoninae). Native to the cold rivers and other freshwater habitats in Eurasia, they are threatened by overfishing and habitat loss.

The earliest fossil remains of this genus are known from the Late Oligocene to middle Miocene of the Vitim Plateau in Russia. Younger remains are also known from the Late Miocene of Ukraine and the Late Pleistocene of Germany. Fossil specimens of a Hucho-like salmonid have been recovered from the Clarkia fossil beds and other localities from the late Neogene of western North America, suggesting they may have potentially inhabited North America too.

Live food is living animals used as food for feeding other carnivorous or omnivorous animals kept in captivity; in other words, small preys that are artificially presented to larger predators kept as exotic pets, livestocks, or display animals in zoo or aquaria. The idea behind using live food is to provide lively feeds that stimulate the proactive hunting instinct in the captive animals, thus retaining their "wildness" state that are often lost in prolonged captivity.

Live food is used to feed a variety of captive animals, typically those are naturally insectivorous, piscivorous or vermivorous, such as spiders, ornamental fish, songbirds and landfowls, small frogs and lizards. Those that are fed larger, tougher and more mobile live prey such as crustaceans, bivalves and rodents are typically hypercarnivorous predators such as mantis shrimps, octopuses, predatory fish, bullfrogs, large reptiles (e.g. crocodiles and alligators, snakes, large varanids such as Komodo dragon and monitor lizards, and snapping turtles), predatory birds and various carnivoran mammals such as great cats, canines and mustelids. Occasionally mesocarnivorous/hypocarnivorous animals such as bears and foxes, who are more generalist and less dietarily dependent on fresh meat, are also fed live food. For instance, pet skunks, who are omnivorous, can technically be fed a limited amount of live food, although this is not known to be a common practice.