The European greenfinch is a small passerine bird. It uses its powerful beak to break open seeds, which it feeds on throughout the year. In winter, it may form groups with other finches and buntings, and as natural seed stocks dwindle at this time of year, it increasingly relies on artificial food sources, such as bird tables. It nests in small colonies in trees and bushes, and only defends a very small area around its nest.
Perch live in schools, usually in the top 50 metres of water, and often mix with other species of fish. Redfin perch are a popular sport fish with some anglers because of their fighting qualities and taste. However, they are also voracious predators of other fish and invertebrates. They can destroy recreational fisheries in enclosed waters by stunting the growth of other fish species or eliminating them.
Globally, the rose-ringed parakeet is the most invasive parrot species and became established in South Africa in the 1970s. It’s mainly a green parrot with a red bill and a long, tapered tail. The species is widely bred in captivity.