| House Martin |
| Small numbers only during
Spring migration, when double figure counts can be rare.
This is a high-flying species on return migration with a
peak reached during September, but fine weather can mean
that large numbers are missed through altitude. Migrant
numbers have dropped since 2003. |
| ... |
| Combined monthly
migration totals per year |
 |
| ... |
| Annual/monthly
migration totals (numerical) |
| ... |
| Year |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
|
Total |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1998 |
|
|
|
14 |
31 |
7 |
|
159 |
1 110 |
34 |
|
|
|
1 355 |
| 1999 |
|
|
|
16 |
43 |
|
28 |
234 |
2 208 |
211 |
|
|
|
2 740 |
| 2000 |
|
|
|
44 |
42 |
24 |
5 |
162 |
1 959 |
183 |
|
|
|
2 419 |
| 2001 |
|
|
|
15 |
49 |
|
|
15 |
994 |
416 |
|
|
|
1 489 |
| 2002 |
|
|
|
6 |
3 |
|
57 |
77 |
905 |
15 |
|
|
|
1 063 |
| 2003 |
|
|
|
10 |
98 |
|
22 |
260 |
138 |
|
|
|
|
528 |
| 2004 |
|
|
|
25 |
23 |
1 |
|
228 |
9 |
|
|
|
|
286 |
| 2005 |
|
|
|
48 |
79 |
|
97 |
35 |
60 |
|
|
|
|
319 |
| 2006 |
|
|
|
23 |
3 |
|
4 |
409 |
29 |
3 |
|
|
|
471 |
| 2007 |
|
|
|
3 |
21 |
|
8 |
45 |
183 |
|
|
|
|
260 |
| 2008 |
|
|
|
8 |
17 |
|
28 |
95 |
651 |
1 |
|
|
|
800 |
| 2009 |
|
|
|
12 |
4 |
|
45 |
84 |
134 |
|
|
|
|
279 |
| 2010 |
|
|
|
28 |
10 |
|
16 |
34 |
127 |
33 |
|
|
|
248 |
|
