Diseases, Conditions, Syndromes

Q&A: What you need to know about avian flu

Multiple states since March 2024 have reported dairy herds displaying symptoms caused by highly pathogenic avian influenza, or HPAI.

Diseases, Conditions, Syndromes

Pasteurized milk 'safe' from bird flu: US officials

Milk sold in US stores is "safe" from the bird flu because pasteurization effectively kills the disease, American health authorities said Friday, following spread of the infection among herds of cows.


What persuades parents to vaccinate their children?

In the last few years, rising vaccine hesitancy levels have contributed to decreased vaccination coverage for common pathogens in the general population, and specifically among minors. During the COVID pandemic, the debate ...

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Herd refers to a social grouping of certain animals of the same species, either wild or domestic, and also to the form of collective animal behavior associated with this (referred to as herding) or as a verb, to herd, to its control by another species such as humans or dogs.

The term herd is generally applied to mammals, and most particularly to the grazing ungulates that classically display this behaviour. Different terms are used for similar groupings in other species; in the case of birds, for example, the word is flocking, but flock may also be used, in certain instances, for mammals, particularly sheep or goats. A group of quail is often referred to as a covey. Large groups of carnivores are usually called packs, and in nature a herd is classically subject to predation from pack hunters.

Special collective nouns may be used for particular taxa (for example a flock of geese, if not in flight, is sometimes called a gaggle) but for theoretical discussions of behavioural ecology, the generic term herd can be used for all such kinds of assemblage.[citation needed]

The word herd, as a noun, can also refer to one who controls, possesses and has care for such groups of animals when they are domesticated. Examples of herds in this sense include shepherds (who tend to sheep), goatherds (who tend to goats), cowherds (who tend cattle), and others.

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