Arrival of migrants

I compiled the table below to answer a query from a student at the Fenner School ANU.  I have put it here as it might be of interest to readers of this blog.

Entries are Month of first return
code	species	2007	2008	2009	2010	2011	2012	AVGE
207	Australian shelduck	7	8	7	7	8	7	7
222	Collared sparrowhawk	7	8		7	8	7	7
235	Australian Hobby			8	11	7		9
318	Dollarbird	11	10	12	11	11		11
326	Sacred Kingfisher	9	10	10	10	11		10
329	Rainbow Bee-eater		11	11	11	11		11
334	White-throated needletail		12					12
337	Pallid Cuckoo	8	9	8	8	9		8
338	Fan-tailed Cuckoo	8	9	9	7	7	8	8
339	Brush Cuckoo	12	10	11	10	11		11
341	Black-eared Cuckoo			12				12
342	Horsfield's Bronze-Cuckoo	8	8	8	8	8	7	8
344	Shining Bronze-cuckoo	9	10	9	9	9	8	9
347	Eastern Koel	12		12	12	11		12
348	Channel-billed Cuckoo			12	11	11		11
359	Tree Martin	10	9	8	7	8	7	8
360	Fairy Martin		11	11	9	9		10
361	Grey fantail	9	7	7	7	7	8	8
365	Leaden flycatcher	11	10	9	10	9		10
401	Rufous whistler	10	7	9	9	8	7	8
430	White-winged triller	9	11	11				10
453	White-throated gerygone	9	10	9	9	9		9
463	Western gerygone	9	9	8	9	8		9
508	Brown Songlark			11				11
509	Rufous songlark	11	11	11	9	11		11
524	Australian reed-warbler			11	10	9		10
545	White-browed woodswallow			9		11		10
547	Dusky woodswallow	10	8	9	9	8	8	9
565	Spotted pardalote	7	7	7	7	8	8	7
578	White-naped honeyeater		7	7	7	9		8
614	Yellow-faced honeyeater	8	8	7	7	8	8	8
645	Noisy friarbird	10	9	9	9	8	8	9
671	Olive-backed oriole	8	8	8	8	9		8
976	Striated pardalote	9	7	8	7	7	7	8