yes
An osthrich is bigger than a sparrow.
Yes, even bigger than the largest wren species.
Yes, a Robin is bigger.
Small passerines - goldcrest, firecrest, wren, robin, blue tit (chickadee in the US), great tit, long-tailed tit, house sparrow, tree sparrow, hedge sparrow (accentor), chaffinch, greenfinch, siskin, redpoll, lesser redpoll, etc etc etc etc - all are no bigger than a house sparrow
The sparrow hawk is a little bit smaller than a kestral.
wren song sparrow
No, smaller, around sparrow sized.
House Wren, House Finch, House Sparrow
The nighthawk.
Yes, even bigger than the largest wren species.
the symbiotic relationship is that the sparrow will build a nest under the nest of the osprey. Thanks internet:)