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January February March April May June July August September October November December
Week1Frequency:1.6% Week2Frequency:2.3% Week3Frequency:1.5% Week4Frequency:2.3% Week1Frequency:1.7% Week2Frequency:1.2% Week3Frequency:0.6% Week4Frequency:1.3% Week1Frequency:1.2% Week2Frequency:1.3% Week3Frequency:1.4% Week4Frequency:1.2% Week1Frequency:0.3% Week2Frequency:1% Week3Frequency:1% Week4Frequency:0.1% Week1Frequency:0.5% Week2Frequency:0.3% Week3Frequency:0.2% Week4Frequency:0.3% Week1Frequency:<0.1% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0.2% Week3Frequency:0.1% Week4Frequency:<0.1% Week1Frequency:0% Week2Frequency:0.1% Week3Frequency:0.1% Week4Frequency:<0.1% Week1Frequency:0.1% Week2Frequency:0.1% Week3Frequency:1.5% Week4Frequency:1.2% Week1Frequency:2% Week2Frequency:3.1% Week3Frequency:2.7% Week4Frequency:2.6% Week1Frequency:1.4% Week2Frequency:1.9% Week3Frequency:2.2% Week4Frequency:1.5%
Weekly frequency data

Last seen: 26 May 2021 by Wetland Survey

© Christopher Rustay
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January February March April May June July August September October November December
Week1Frequency:1.6% Week2Frequency:2.2% Week3Frequency:1.2% Week4Frequency:2.5% Week1Frequency:2% Week2Frequency:1.5% Week3Frequency:0.8% Week4Frequency:1% Week1Frequency:1.1% Week2Frequency:0.7% Week3Frequency:0.5% Week4Frequency:0.5% Week1Frequency:0% Week2Frequency:0.1% Week3Frequency:0.4% Week4Frequency:0.3% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0.2% Week1Frequency:0.5% Week2Frequency:1% Week3Frequency:1.5% Week4Frequency:0.7% Week1Frequency:0.8% Week2Frequency:0.9% Week3Frequency:1.2% Week4Frequency:1.2%
Weekly frequency data

Last seen: 20 Feb 2021 by Karen Herzenberg

© Danny Tipton
© Doug Gochfeld
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January February March April May June July August September October November December
Week1Frequency:1.6% Week2Frequency:1.7% Week3Frequency:1% Week4Frequency:1.7% Week1Frequency:0.9% Week2Frequency:1% Week3Frequency:0.6% Week4Frequency:0.9% Week1Frequency:0.7% Week2Frequency:0.6% Week3Frequency:0.2% Week4Frequency:0.8% Week1Frequency:1.6% Week2Frequency:0.7% Week3Frequency:0.7% Week4Frequency:0.5% Week1Frequency:0.1% Week2Frequency:<0.1% Week3Frequency:0% Week4Frequency:0.1% Week1Frequency:0.1% Week2Frequency:0% Week3Frequency:0.1% Week4Frequency:0.1% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0.1% Week3Frequency:0.1% Week4Frequency:0.5% Week1Frequency:1.8% Week2Frequency:2.2% Week3Frequency:1.6% Week4Frequency:1.7% Week1Frequency:1.4% Week2Frequency:1.5% Week3Frequency:1.7% Week4Frequency:1.1%
Weekly frequency data

Last seen: 3 Feb 2021 by Lee Wallace

© Michael Andersen
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January February March April May June July August September October November December
Week1Frequency:0.2% Week2Frequency:<0.1% Week3Frequency:0% Week4Frequency:0.3% Week1Frequency:0% Week2Frequency:0.2% Week3Frequency:0.1% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0.9% Week2Frequency:0% Week3Frequency:0.4% Week4Frequency:0.6% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0.7% Week4Frequency:0.2%
Weekly frequency data

Last seen: 31 Jan 2021 by J Joseph

© Michael Andersen
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January February March April May June July August September October November December
Week1Frequency:10.4% Week2Frequency:9.1% Week3Frequency:8.8% Week4Frequency:11.7% Week1Frequency:10.1% Week2Frequency:6.2% Week3Frequency:4.4% Week4Frequency:7% Week1Frequency:7.3% Week2Frequency:2.8% Week3Frequency:2.7% Week4Frequency:1.9% Week1Frequency:0.7% Week2Frequency:0.6% Week3Frequency:0.2% Week4Frequency:0.1% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0% Week1Frequency:0% Week2Frequency:0% Week3Frequency:0% Week4Frequency:0.1% Week1Frequency:0.6% Week2Frequency:0.3% Week3Frequency:2.1% Week4Frequency:5.2% Week1Frequency:10.4% Week2Frequency:11.3% Week3Frequency:11.7% Week4Frequency:9.9% Week1Frequency:9.6% Week2Frequency:9.5% Week3Frequency:10.7% Week4Frequency:9.6%
Weekly frequency data

Last seen: 14 Apr 2021 by Ulrike Guggenheim

© Fyn Kynd
© Herb Elliott
January February March April May June July August September October November December
Week1Frequency:35.1% Week2Frequency:32.2% Week3Frequency:31.7% Week4Frequency:35.5% Week1Frequency:35.1% Week2Frequency:27.4% Week3Frequency:26.5% Week4Frequency:33.1% Week1Frequency:32.2% Week2Frequency:27.9% Week3Frequency:31.1% Week4Frequency:35% Week1Frequency:32.8% Week2Frequency:32% Week3Frequency:34.9% Week4Frequency:32.1% Week1Frequency:30% Week2Frequency:27.4% Week3Frequency:25.8% Week4Frequency:19.8% Week1Frequency:13.9% Week2Frequency:12.3% Week3Frequency:11.7% Week4Frequency:13.8% Week1Frequency:14.2% Week2Frequency:16.9% Week3Frequency:15.7% Week4Frequency:16.8% Week1Frequency:20.3% Week2Frequency:23.1% Week3Frequency:24.9% Week4Frequency:25.7% Week1Frequency:31.3% Week2Frequency:29.1% Week3Frequency:28.3% Week4Frequency:36.2% Week1Frequency:31.5% Week2Frequency:30.7% Week3Frequency:34.3% Week4Frequency:33.8% Week1Frequency:37.4% Week2Frequency:36.7% Week3Frequency:35.4% Week4Frequency:32.2% Week1Frequency:34.1% Week2Frequency:33.7% Week3Frequency:34.9% Week4Frequency:30.9%
Weekly frequency data

Last seen: 24 Jun 2021 by Dave Hawksworth

© Jack Parlapiano
© Dave Hawksworth
© Nancy Hetrick
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