Both of these are harmful insecticides used widely in flea and tick treatments for pets, which then end up in birds' nests through pet hair lining. The researchers also tested all the nests for ...

The government says it’s time to look again at the sale of pet flea treatments after scientists warned the chemicals in them kill wildlife including songbirds.

Scientists at the University of Sussex have found that bird chicks are dying in considerable quantities because their nests are being made with cat fur that’s been flea-treated. The treatment is ...

The eggs are laid in the host nest, where the larvae develop as scavengers, feeding on detritus and flea faeces. The resulting pupae can remain dormant for some time, emerging as adults in response to ...