Oldhammer Swallow stats

Hello fellow oldhammer fans,
I have a query for the community: What should the stats for Giant Swallows be?

First some context.

What sort of a beast are Giant Swallows?
Swallows are not raptors like falcons, Giant Eagles, Warhawks, or Eagles. Rather, real world swallows are nimble insectivores.

How big are these Giant Swallows?
The pictures below feature a mounted and dismounted Gnomish captain (I shipped the Giant Swallows before it occurred to me to take a scaling pic.) The Giant Swallows aren't terribly big.

For comparison what do other Bird stats look like in warhammer?

Great Eagle	M	WS	BS	S	T	W	I	A	Ld	Int	Cl	WP
	2	7	0	5	4	3	5	2	8	7	8	8
Warhawk	M	WS	BS	S	T	W	I	A	Ld	Int	Cl	WP
	2	4	0	3	3	1	5	1	7
Giant Owl*	M	WS	BS	S	T	W	I	A	Ld	Int	Cl	WP
	2	6	0	5	4	2	5	2	6	4	6	9
Razorbill**	M	WS	BS	S	T	W	I	A	Ld	Int	Cl	WP
	2	3	0	1	2	1	3	1	1	1	1	1

* Giant Owl stats were taken from Warhammer Fantasy Roleplay 1st ed.
** Razorbills are essentially large angry puffins, also from WFRP.

I figure that Swallows are between a Warhawk and a Razorbill.

Swallow	M	WS	BS	S	T	W	I	A	Ld	Int	Cl	WP
	2	4	0	3	2	1	4	1	6	3	6	6

What do you think?