Jazzoos news and views: Sector 9 survey; A good look at a Cicadabird

Friday 14 November 2008

Sector 9 survey; A good look at a Cicadabird

Another sector finished this morning! It was a strenuous walk, with a lot of hills and gullies. The survey was undertaken on the east side of the Pacific motorway, which meant I entered the forest from the Mt Gravatt campus. Nothing extraordinary during this survey, apart from a large number of Sacred Kingfisher (even though there were only 8, that is a lot relative to what you would normally see) and a large number of Silvereye, the latter probably because of the dense understorey associated with the many gullies. The highlight of the morning though was my best ever sighting of a Cicadabird! I heard one on one of the ridge lines. Their call is amazing, and funnily enough, sounds like a cicada to the untrained ear! (Click here to listen to recording) As I got closer I managed to track the source down and there it was in plain view (albeit through the binoculars)! I have previously had a fleeting glimpse of a single individual on Mt Duval (just to the north of Armidale NSW), but this was a long and great view of one!

Date: 14th November 2008
Time: 0535 - 0800
Sector: 9
Number of species seen: 18
Number of birds seen: 155

Black-faced Cuckoo-shrike (3)
Cicadabird (1) Galah (2)
Grey Butcherbird (1)
Noisy Miner (11)
Olive-backed Oriole (3)
Pale-headed Rosella (2)
Rainbow Lorikeet (34)
Sacred Kingfisher (8)
Scaly-breasted Lorikeet (3)
Silvereye (31)
Striated Pardalote (3)
Torresian Crow (4)
Variegated Fairy-wren (23)
White-browed Scrub-wren (7)
Welcome Swallow (3)
White-throated Honeyeater (4)
Yellow-faced Honeyeater (12)

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Random fact...

The gravity of a black hole is so strong that it prohibits light from escaping the collapsing star that created it, so given that light can't escape, it is effectively dark, thus the name 'black hole'. There is a 'boundary' between the black hole and the non black hole called the event horizon. Now, in an idealised theoretical world, imagine a situation where an astronaut was floating toward this event horizon from an orbiting spacecraft while sending messages (light signal, beeps etc) back every second. To the astronaut, as he/she approached the black hole event horizon, and even as he/she crossed the event horizon (space and time don't officially exist beyond the event horizon, I think, but say for now it does), he/she would continue to observe, every second, a message being sent to the crew waiting on the spacecraft! HOWEVER, to the crew on the spacecraft, the length of time that passed between messages from the astronaut would slowly lengthen as the astronaut approached the event horizon. Once this event horizon was crossed, the spacecraft would no longer receive any messages, as the gravitational field is so strong that NOTHING can escape. So the important thing to get from this (apart from the absurdity of actually wanting to approach a black hole), is that not only is time affected by gravity, but time is relative to the observer. What seems like a long time to one person has the potential to be experienced differently by another. Experiments in the 1960s using caesium clocks (very, very accurate nuclear clocks) found that the slight difference in gravity at the top of a 30m high tower compared to the ground resulted in time running slightly slower at ground level. This is known as 'gravitational time dilation', although the amount of time we are talking about is in the order of nano-seconds (0.000000001 secs). This occurs as gravity has the effect of slowing time! Interestingly, this effect is significant enough that the Global Positioning System (used in GPS units and in-car navigation units) needs to correct for its effect on clocks aboard artificial satellites orbiting the Earth!!

What I'm reading...

A Brief History of Time - Stephen Hawking (256pp. - 1988)

My dad had this book years and years ago, but I never got around to reading it. I saw it the other day in a Borders bookstore and decided to read it. It is the original 1988 edition, although since then there have been at least two other versions, including a 1996 version that includes a lot more figures to help explain the complex mathematical and physics concepts.

A Brief History of Time attempts to explain a range of subjects in cosmology, including the Big Bang, black holes, neutron stars, light cones and superstring theory to the nonspecialist reader. Its main goal is to give an overview of the subject but, unusual for a popular science book, it also attempts to explain some complex mathematics. Suprisingly, Stephen Hawking has an often comical way of writing, suprising given his amazingly superior intellect!

Half way through the book at the moment, and finding it hard to grasp some of the concepts; may require a couple of reads!!

What I'm listening to...

Tame Impala - EP (2008) - psychedelic/indie rock band from Perth (where all good bands originate), making it big in Australia!
The Presets - Apocalypso (2008)
Massive Attack - 100th Window (2003)
mmd_as - mmd_as (2009) - a collaborative electronica album showcasing mr_mark_dollin and Alex Strain. Download the album and info here
Radiohead - Kid A (2000)
Arvo Pärt - Arvo Pärt: A Portrait (2005) - Arvo Pärt is an Estonian composer (1935 - )that is heralded as pioneering the mystic minimalism style of classical music

Featured websites...

Litoria Consulting - This is the environmental consultant company that I work for as a Senior Ecologist. We're a specialised environmental consulting firm, with professional capabilities in the areas of environment, economics and planning; my specialty is fauna ecology, especially birds.

Nuts about Natives - promoting a small contract-based plant propagation business providing private, community, government and commercial agencies with superb native plants for everything from promoting the benefits of gardens with native plants to revegetation projects. Operates just south of Perth, and happens to be co-owned by my sister!

mmd - the official website for the music from artist and close friend Mark Dollin. Peruse through pages of interesting philosophical essays on his blog, while downloading and listening to hours of music described as everything from ambient pop to highly technical ambient soundscapes to quirky electronica!! Check it out!!

About me...

My name is Jarrad Cousin, although also go by jazzoo, buddhahead, helmet, dr jarrad, jizzdog, j-rad or jezza...

I am 32 years old, married with a young son, loving life and loving work! I am patriotically Western Australian, having lived the first 24 years of my life in Perth. I moved to Armidale NSW to undertake my PhD in 2003, and having completed that, I moved to Brisbane, where I worked at Griffith University as a post-doctoral research fellow in avian ecology, and am now Senior Ecologist at Litoria Consulting!