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...

mRNA
Protein Synthesis

Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Energy pyramid
Freshwater Community Energy Relationships – Producers & Consumers

This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

Still Water Animals
Still Water Animals

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

Neural Control Mechanisms
Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..