Although anecdotally there seem to be far fewer sparrows around now, they are still a common feature in many backyards ...
Sparrows, teachers and lead poisoning in children: the surprising link
Have you ever paused to really notice how sparrows move around in urban landscapes, exploring beneath shrubs, picking up stray crumbs and pecking through open grass areas?
Researchers could show that in the places where the blood lead levels of sparrows was highest, the same was often true for children living in a similar location.
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