For the most part yes. Wrens are pretty smaller than thrushes.
A robin. Wrens are smaller birders while a robin is quite larger.
yes
Wren
robin
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.
Pigeons are bigger.