BBC NEWS | Science & Environment | Earwigs 'sniff out' best babies

BBC NEWS | Science & Environment | Earwigs 'sniff out' best babies: "Earwig mothers sniff out their 'best' offspring and lavish them with care, according to new research.

The insects pick up odours from their clutch of 'nymphs' and adjust their maternal behaviour in response.

When they pick up a chemical signal from healthy, well-fed youngsters, they spend more time nursing them, at the expense of their hungrier babies."