The birds
I admit that I haven't been cutting edge sharp on the finer details of tristis identification. Tristis, the Siberian subspecies of the Common Chiffchaff (Phylloscopus collybita) [gransanger]. The common chiffchaffs are indeed that in our region: common, whereas tristis is only visiting in few numbers, and mainly during the autumn migration.

I've mostly hold in memory that tristis has a quite different, more chicken-like call, iiie, compared to the standard huit-call of the common birds. These two calls are distinctively different in the field, and in our region the main confusion regarding the birds saying huit refers to Willow Warbler [løvsanger], although willow tends to give it as two syllable call more like, huu-it. However, without an analysis of the sound, that can be difficult to perceive in the field. To the untrained ear, I'm sure many tiny calls from various song birds can sound like a tristis.

More than focusing on the difference in calls, I've also noted, when studying the subject, that there exists a general warning-opinion about common birds being able to give calls similar to the ones given by tristis. I've come to interpret this as: "Be aware that the common birds can have many different calls, why it has to ... read more

 2024-11-17
Årets sidste guldsmede
Sidst i september var der fortsat liv i en række arter her på Amager. Affusningen var dog så småt i gang, og den 19. september blev en enlig Stor Farvevandnymfe i Travbaneparken året sidste, og to dage senere så jeg den sidste Blå Mosaikguldsmed ved vandhullet i Søvang. Og da vi nåede frem til oktober var de sidste Blodrøde og Almindelige Hedelibeller også holdt op med at flyve. Henholdsvis den 28. og den 29. september havde jeg de sidste.

Med tanke på det som virkede som en tidligere forårsstart end normalt, kunne man have troet at flyveafslutningen også ville blive fremrykket. Det er dog ikke tilfældet, da de sidste eksemplarer af de to hedelibeller fløj på samme tid året før. I en sommer som ikke har været specielt varm, er det måske meget naturligt at ... read more

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The biggest swift in the world, the White-naped Swift with a wingspan greater than half a meter, is a Mexican endemic living in the western Sierra Madre mountains.

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