Dictionary > Squawk

Squawk

Squawk may pertain to the loud sound or shrill made by patient with a lung disorder or by a bird when alarmed. The squawks produced by patients with lung disorder (e.g. hypersensitivity pneumonitis) are characterized by short wheezes or squeaks. They demonstrate waveforms in sinusoidal pattern. The frequency ranges from 200 to 800 Hz and the duration, from 10 to 100 ms. In birds, the squawk refers to Nyctanassa violacea, commonly known as the yellow-crowned night heron. It belongs to the family Ardeidae of the order Pelecaniformes, class Aves, phylum Chordata. This bird species is known for its squawks as one of its vocalizations. It is heard when the bird lifts off or it gives an alarm or aggression call.

References

  1. Paciej, R., Vyshedskiy, A., Bana, D., & Murphy, R. (2004). Squawks in pneumonia. Thorax 59:177–179.

© Biology Online. Content provided and moderated by Biology Online Editors



You will also like...

Still Water Animals
Still Water Animals

Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

Plant Auxins
Plant Auxins – Phototropism & Geotropism

Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

Gibberellins and Gibberellic Acid
Gibberellins and Gibberellic Acid

This tutorial describes the role of gibberellin family in plants. Find out the effects of gibberellin on plant growth an..

The Human Physiology
The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Protein (illustration)
Protein Variety

The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

Control of body movement
Control of Body Movement

Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..