Complex sentence: Grebes are small to medium-large water birds with lobed, rather than webbed, toes; there are several genera, of which the most widespread is "Podiceps" with nine species, one recently extinct.
Split into simpler sentences: Grebes are small to medium-large water birds with lobed, rather than webbed, toes. There are several genera, of which the most widespread is "Podiceps" with nine species, one recently extinct.