Decision making of autumn migrations of woodpigeons Columba palumbus

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ITALY – Fig. 26 >> 58

TABLE ( C ) – ITALY data collected in Archives of “Progetto Colombaccio” Club Italiano del Colombaccio ( Head of the Team Rinaldo Bucchi ) - Official Migration counts on 4.831.138 woodpigeons counted 1998-2007 ( 10 years ) – 12 peaks of migration

WEATHER	Long distance 78-48h before	MEDIUM 48-24h	SHORT 24-12h	Transit IT Area-12-0h


Cloudy	33%	25%	33%	25%
Clear	42%	42%	59%	50%
Fog	25%	25%	----	17%
Light rain	-----	8%	----	----
Rain	----	----	8%	8%
Light snow	-----	----	----	----

WIND Direction *	%	%	%	%
Nord N	24	---	17	---
NE	17	25	17	43
NW	0	----	8	8
EST	24	----	17	8
WEST	0	----	8	--
SOUTH	25	----	33	--
SE	10	----	--	8
SW	---	----	--	--
Variable	---	75	--	33
NO-wind	---	----	---	--
*Statystical analysis very difficult
VISIBILITY	%	%	%	%
0-5 Km	10	--	--	25
6-10Km	90	100	100	75


LENGTH of the DAY	10h30’/11h15’




WIND POWER	Long %	Medium %	Short %	Transit %
0-5 Km/h	----	----	---	17
6-10	42	67	15	58
11-15	50	8	54	---
16-20	8	---	8	17
21-25	----	----	8	---
26-30	----	----	---	---
NO Wind	----	25	15	8

HUMIDITY	%	%	%	%
60-80%	20	---	---	30
81-90%	80	100	100	70
91-100%	---	----	----	---

MOON	%	%	%	%
New	----	----	----
Growth	50	60	58	25
FULL	----	20	17	17
Lowering	50	20	25	58

Lighted moon surface % more 40%	8/12	8/12	8/12	5/12

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