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Experiments on blue jays suggest they form a search image for certain prey.. Visual predators may form what is termed a search image of certain prey.. Predators need not locate their host directly: Kestrels, for instance, are able to detect the faeces and urine of their prey (which reflect ultraviolet), allowing them to identify areas where there are large numbers of voles, for example.
Predatory birds hunting in pairs have been observed using a "bait and switch" technique, whereby one bird will distract the prey while the other swoops in for the kill. Social behavior requires individual identification, and most birds appear to be capable of recognizing mates, siblings, and young.
The visual ability of birds of prey is legendary, and the keenness of their eyesight is due to a variety of factors. Raptors have large eyes for their size, 1.4 times greater than the average for birds of the same weight, [14] and the eye is tube-shaped to produce a larger retinal image. The resolving power of an eye depends both on the optics ...
How do birds get their colors? Understanding bird coloration combines biology and physics. There are two primary ways that birds get their color: pigmentation and the physical structure of the ...
The photographer continued: “On one of my recent trips for this assignment, I witnessed firsthand the different strategies birds use to prey on monarchs during hibernation—something that is ...
Individual species may be generalists or specialize in certain prey types, such as the yellow-crowned night heron, which specializes in crustaceans, particularly crabs. [10] Many species also opportunistically take larger prey, including birds and bird eggs, rodents, and more rarely carrion. Even more rarely, herons eating acorns, peas, and ...
A new project to protect birds of prey in parts of Sheffield has been launched. Owlthorpe Fields Conservation Group wants to monitor and help boost the population of various raptor species in the ...
Spotted hyenas prefer prey with a body mass range of 56–182 kg (123–401 lb), with a mode of 102 kg (225 lb). [11] When hunting medium to large sized prey, spotted hyenas tend to select certain categories of animal; young animals are frequently targeted, as are old ones, though the latter category is not so significant when hunting zebras ...