Published Date: 20 March 2008
By Lyndsay Mos
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeY4uH6sLnBtaER9UmMfdgJPm4FyrP_7x4xc8UepxktUnvR0h0pUyxjnWZRCX4Z7EWTJpyPfg9Q8VPpowP4Wof1Lg_Gf1biNF_meKBLCTHhCyN2g9o1JhV-r-i9ekl8W1WR8llSOxerYw/s320/crestedtit_300_tcm9-139767_v1.jpg)
Health Correspondent
THE secret of how birds know to sing in springtime has been discovered by researchers in Scotland and Japan.
A key part of the brain in birds is affected by seasonal change. The team found that, when birds are exposed to more light, cells near the pituitary gland release a hormone that sparks a series of reactions, making them ready for the mating season, when they sing more to attract a partner.
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