Black Bittern Ixobrychus flavicollis
Estimated average number of individuals by week based on eBird data, Jul 2012 to Jun 2022
Peak week Jan 01-Jan 07, Feb 12-Feb 18, Dec 17-Dec 23
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Nov to Apr is the best period to catch this scarce migrant, although oversummering has been recorded recently. (Data in the chart is only until Jun 2022.)