You wouldn’t want to find one of these heavy beasts on your birdfeeder…

1 COMMON OSTRICH 157kg
Weighs as much as a piano and stands at an impressive 2.7m tall

2 SOMALI OSTRICH 130kg
Native to the Horn of Africa in the easternmost part of the continent

3 SOUTHERN CASSOWARY 85kg
The prehistoric-looking southern cassowary is about 1.7m tall

4 NORTHERN CASSOWARY 75kg
Has a single rather than a double wattle

5 EMU 70kg
Found only in Australia

6 EMPEROR PENGUIN 46kg
The first non-ratite on our list

7 GREATER RHEA 40kg
The largest living native bird anywhere in the Americas

8 WILD TURKEY 39kg
The only bird on our list that can fly!

9 DWARF CASSOWARY 34kg
Smallest of the three cassowary species, also known as the mountain cassowary

10 LESSER RHEA 29kg
Thought to have helped start Charles Darwin’s musings on evolution