I fly in the Up North Combine and in 2004/5/6 the birds would go so low over you could practically touch them as they hedge hopped - or fence hopped even - so tightly packed together its a wonder they had the room to flap their wings unheeded
2007/8 a different story - don't know why - but we hardly ever see any birds now - and where we'd see kits of several hundreds in previous years - there'd barely be a hundred in the kits we do see now
with 6 liberations at most race points - you could count the liberations - there was a distinct end to one and start to another - but again - not any more - they just seem to intermingle and you can't tell the liberations apart