As regular CFZ-watchers will know, for some time Corinna has been doing a column for Animals & Men and a regular segment on On The Track... particularly about out-of-place birds and rare vagrants. There seem to be more and more bird stories from all over the world hitting the news these days so, to make room for them all - and to give them all equal and worthy coverage - she has set up this new blog to cover all things feathery and Fortean.
Showing posts with label sound. Show all posts
Showing posts with label sound. Show all posts

Friday, 11 April 2014

Counting the invisible by sound: New approach to estimate seabird populations

Date:
April 9, 2014

Source:
Pensoft Publishers

Summary:
Many seabird species nest underground, approach their nests only during darkness, and are essentially invisible on land and impossible to count. By deploying automated sound recorders on a remote island and counting the recorded calls, a team of seabird researchers was able to estimate the size of a breeding colony of shearwaters on a remote island in the North Atlantic.


Wednesday, 21 November 2012

Light and sound used against Rome's birds


TIRED of bird droppings on the city's most famous monuments, local authorities in Rome are resorting to unusual measures to try and scare off a million starlings that migrate to the Eternal City every year.

Armed with loudspeakers and light projectors, workers dressed in white overalls and masks have been seen walking around at sunset along the tree-lined embankments of the Tiber River where starlings tend to congregate.

The loudspeakers blast out shrieks of alarm used by the starlings and the projectors are shone into the trees to scare off the birds.

"Their reaction is immediate," city hall said in a statement on Friday.

"The starlings abandon the area and get as far away as possible from the area, which they consider dangerous," it said, adding that the method "respects the environment and the birds and does not create a nuisance for residents".

The sound-and-light attacks last around an hour and are always carried out at dusk for three days in a row to ensure the desired effect.


Rome has the highest number of starlings in Italy - around a million are estimated to migrate there every autumn and winter.


Saturday, 10 November 2012

Baby wrens must chirp a secret password to be fed, study finds


The nestlings of fairy-wrens don’t have much of a choice when it comes to listening to their mothers: The birds must reproduce a particular sound learned from their moms to be fed, according to a study published Thursday in the journal Current Biology.

The researchers, led by Sonia Kleindorfer of Flinders University in Australia, call the sound the bird’s “learned password.”

The team discovered the remarkable mother-chick ritual by chance when they noticed that the mothers were aiming calls at their eggs well before they hatched. So they set out to determine why. First, the researchers realized that the call made by the nestlings in order to be fed was different in each nest, suggesting it might be learned.

The pieces began to come together when the team also observed that each nest’s begging call — the password the nestlings need — was contained within the call that the mothers made to their unhatched eggs. In order to prove that the chicks were learning the sound from their moms rather than the song being innate, Kleindorfer and her team swapped the eggs from two different nests. Once hatched, the chicks produced the begging call of their foster moms, not their birth moms, proof the call was in fact learned in the egg.

Thursday, 20 September 2012

Bill Oddie tweets for birds on Twitter

As the zoo's aviary woke up, Oddie and head bird-keeper Adrian Wallis were on hand to interpret the chirps of its tropical residents and summarise the results in 140 characters.

September sees a flurry of activity in the bird world as migration season begins, and so the event was held to mark the occasion.

According to Oddie, trained ears can pick up on the subtle differences that alter the meaning of a bird call.

"Every bird has a bit of a vocabulary. They have seven different areas of sound, and they will all have meaning. It might be a young bird asking for food, or a bird saying 'this is my territory'," he said.

"That Red Billed Toucan was calling for a girlfriend. Sounds to me like he is shouting for some company!" read one of Oddie's Tweets. Another said: "Very territorial call from the Scarlet Chested Sunbird - protecting its nest"

Watch video and read more: http://www.telegraph.co.uk/technology/twitter/9551273/Bill-Oddie-tweets-for-birds-on-Twitter.html