A Small Tree Finch from the Galápagos Islands with an enlarged nostril caused by a parasite.
Katharina J Peters
An infestation as a chick leads to enlarged nostrils in the beak of Darwin finches, and that affects their mating call.
The mesquite tree was introduced into South Africa to aid farmers and local communities. It is now invasive in most parts of the country.
The invasive mesquite tree has a negative impact on everything from biodiversity to human health. Management programmes are crucial.
Eucalyptus trees in plantations are particularly vulnerable to pests.
Invasive pests threaten the world's much-needed planted forests, as trees are declining.
Male gobies are like peacocks. This is the Edgbaston Goby.
Gobies are one of the largest and most widespread fish families in the world, but even so, the presence of endemic species in the Great Artesian Basin spring complexes of central Australia is a little…