“As drought kicks in, the choughs experience several things simultaneously. The shortage of food increases their stress levels; the birds are forced… — Tim Birkhead Copy Share Image
The Australian wedge-tailed eagle has enormous eyes, both in absolute terms and compared with most other birds, and as a result has the greatest… — Tim Birkhead Copy Share Image
“As drought kicks in, the choughs experience several things simultaneously. The shortage of food increases their stress levels; the birds are forced to spend… — Tim Birkhead Copy Share Image
The human eye has long fascinated lovers, artists and physicians. The ancient Greeks dissected eyes, but struggled to understand how they worked, unclear as… — Tim Birkhead Copy Share Image
“When I mentioned to a friend I was writing a book about eggs he told me to be sure to mention how in Thomas… — Tim Birkhead Copy Share Image
I am not going to speculate about the emotions that might be involved in avian infidelity. — Tim Birkhead Copy Share Image
“Ingeniously, [Heinrich Wickmann] was able to use a pencil to mark that bit of the egg he could see inside the hen's oviduct, through… — Tim Birkhead Copy Share Image
“One of the most remarkable of all ornithological discoveries was the realisation that birds in temperate regions undergo enormous seasonal changes in their internal… — Tim Birkhead Copy Share Image
Although we tend to think of the brain as a discrete organ - a lump of squidgy tissue - it is better to think… — Tim Birkhead Copy Share Image
Compared with mammals, birds have relatively large eyes. In simple terms, a bigger eye means better vision, and excellent vision is essential for avoiding… — Tim Birkhead Copy Share Image
There are several ways we can know what a dog, a bird or, indeed, any other organism can see, for example either by looking… — Tim Birkhead Copy Share Image
