Cart Is Empty
In issue 311 -
Unique voice print in parrots – By The Max Planck Society, Behavioural Biology Cognitive Research
In issue 311 -
Endangered Parrots – 40 years on – By Rosemary Low
In issue 311 -
An Endangered Mexican Parrot – thriving in urban areas of south Texas – By GrrlScientist Senior Contributor at Forbes, evolutionary & behavioural ecologist, ornithologist & science writer
In issue 311 -
Human-altered habitat spurs nesting innovations in neotropical parrots – By David Waugh Correspondent, Loro Parque Fundación
Subscribe To Parrots Magazine - Don't miss a thing

Improving wild population estimates: The Vinaceous-breasted Parrot example

Spreads for web 4

by David Waugh, Correspondent, Loro Parque Fundación

The flight calls of Vinaceous-breasted Parrots (Amazona vinacea) lingered in the chill air of the austral winter dawn in southern Brazil. However, no parrots were seen, because the dense early morning mist had not dispersed by the time the parrots left their night-time roosts in search of food. Normally it would not matter, but in this instance a team of experienced parrot observers, assembled to make a formal coordinated count of the parrots, were thwarted in their task that morning.

This is just one of a variety of circumstances (known as sources of uncertainty) that can negatively affect the estimate of population size, not only of the Vinaceous-breasted Parrot, but also of other species of parrots and other animals. The challenge is to find the best possible way around each circumstance, to arrive with confidence at an estimate which is closest to the real population size.

Due to differences in ecology and behaviour, some species of parrots can be easier to count than others. Species like the Vinaceous-breasted Parrot, which fly conspicuously to and from night-time roosts, may be easier to count, but are still affected by sources of uncertainty. A recently published study addresses these issues in relation to the total count of Vinaceous-breasted Parrots in their three home countries of Argentina, Brazil (where the majority occur) and Paraguay. These counts constitute one of various actions supported by the Loro Parque Fundación for the conservation of this species in Brazil, undertaken by the Friends of Environment Association (Associação Amigos do Meio Ambiente – AMA), and in Paraguay by the BirdLife International partner, Guyra Paraguay.

Buy Now!




Invalid Name
Invalid email address
Please identify how you found us
Invalid Input

Subscribe Now!

Subscribe to parrots magazine

subscribe today. The best most widely read magazine for parrot lovers.


Our Address

Parrots magazine is published by
Imax Visual Ltd, West Building,
Elm Grove Lane, Steyning BN44 3SA

Telephone +44 (0)1273 464777
© Parrots magazine 2023