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Hi, my very good friend Pasi J?rgens is workin in our zoo. During the year several wounded specimens are brought there to have some help. Birds have been flying to windows etc. He has been rearing Common Swifts (Apus apus) over ten years and every year around 10-15 % of the birds are carrying this fly. This time the behaviour of the fly was differend and made Pasi to take his camera for pictures. The fly must have been in the end of it's life cycle, because it layed an egg :o. This was something that made us wonder and ask if someone knows more. There is only one egg, or is it egg at all ? I believe the fly is Crataerina pallida but what came out from it's abdomen ? Pupae, eggsack, just one egg, some parasite .... The pistures were taken yesterday August 23. 2008 here in Helsinki, Finland.

Jari