Oxford Island yesterday and today...
3 tree sparrows
4 stonechat (1 adult female and 3 fledglings)
2 buzzard soaring and diving over Closet Meadows
1 grasshopper warbler reeling quietly (first one for me at Oxford this year).
It's also my birthday tomorrow and I got Birds of the Western Palearctic on DVD-ROM (BWPi) for £139 off Birdguides. Thought it was maybe a bit dear, but I can assure you all that it is worth every penny!!! The detail it goes into about every species is astonishing.
One interesting fact I've learnt is that Kestrels are, "capable of killing species up to size of adult Lapwing Vanellus vanellus, Turtle Dove Streptopelia turtur, and Coot Fulica atra."
This is nothing to the detail it goes into though, every wee wing shiver or flap or glide or cheep that you've ever seen a bird do and wondered what it was at is explained in here!
Already posted this elsewhere on Bird Forum but here's my favourite discovery so far...
Last June I posted this on bird forum...
"On one of the warm, calm days last week I noticed some interesting behaviour from two swallows.
The first bird was carrying a white feather in it's bill. The swallow let go of the feather, which floated downwards, whereupon the swallow wheeled round and caught it again in mid-air, like it was catching a large insect. The bird repeated this action three times.
When the swallow dropped the feather for a fourth time another swallow swooped in and caught it. This looked like it was a pre-meditated aerial pass! This bird too then dropped the feather and the original bird re-claimed it just before it hit the ground.
Has anyone ever seen behaviour like this? I know swallows collect feathers for their nests, so perhaps this one was simply too big for them to handle? Is it too fanciful to suggest the birds might have been playing or practising their hunting skills?"
BWPi gave me this tantalising line about swallows which reminded me of this swallow sighting, "For feather-'play' by flock of 30–40 birds while feeding and bathing, see Kliebe 1970."
I couldn't find Kliebe 1970 on Google but decided to check house martins, sand martins etc. on BWPi to see if it said anything similar for these closely related species. And sure enough it states that sand martins will, "Commonly play with feathers, dropping them in flight and retrieving them (C J Mead)."
This is exactly what "my" swallows were doing and I suspect what Kliebe was on about as well.
I'm half hoping that Kliebe's "feather-play" is something completely different and I've discovered new behaviour for swallows!