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Studies in bird behaviour include the use of tamed and trained birds in captivity. Studies on bird intelligence and song learning have been largely laboratory-based. Field researchers may make use of a wide range of techniques such as the use of dummy owls to elicit mobbing behaviour, and dummy males or the use of call playback to elicit ...
Trade-offs in anatomy and physiology are common, and this is seen in the olfactory lobes of most avian species. Possibly due to the larger-than-average optic lobes, avian olfactory lobes are relatively small; few bird species use smell to find food. Falcons and eagles do not tend to have larger cerebellums for flying.
Hair and other α-keratins consist of α-helically coiled single protein strands (with regular intra-chain H-bonding), which are then further twisted into superhelical ropes that may be further coiled. The β-keratins of reptiles and birds have β-pleated sheets twisted together, then stabilized and hardened by disulfide bridges.
Animals use colour to advertise services such as cleaning to animals of other species; to signal their sexual status to other members of the same species; and in mimicry, taking advantage of the warning coloration of another species. Some animals use flashes of colour to divert attacks by startling predators. Zebras may possibly use motion ...
Sexual selection in birds concerns how birds have evolved a variety of mating behaviors, with the peacock tail being perhaps the most famous example of sexual selection and the Fisherian runaway. Commonly occurring sexual dimorphisms such as size and color differences are energetically costly attributes that signal competitive breeding ...
Active ingredients: Tamarind seed extract, panthenol, vitamin E, hydrolyzed proteins | Formula: Spray | Hair types: All types This Ouai Leave In Conditioner is worn, and loved, regularly by one of ...
Some birds possess specialized hair-like feathers called rictal bristles around the base of the beak which are sometimes referred to as whiskers. The whiskered auklet ( Aethia pygmaea ) has striking, stiff white feathers protruding from above and below the eyes of the otherwise slate-grey bird, and a dark plume which swoops forward from the top ...
L-cysteine is an amino acid found in keratin, which some food manufacturers use to stabilize dough and create a savory flavor. Duck feathers can provide L-cysteine, but so can human hair!