Wednesday 20 December 2017

Redwing



The passage of several hundred Redwing through Camrose in the last few weeks has provided a second year of good biometric data. 50/50 - Adults/Juveniles. Give the migrating distances involved, we noted several birds in the 70g bracket, several topping 75g and one at 82.2g, the average weight of a Redwing is 65g. The average wing as per BTO data is 119mm and the majority were just that or 1mm -/+, however, some birds were measuring well into the 120’s with one topping 129mm. A calm early morning seems the ideal time but to find one in November and December is an endeavour, to collect this very ‘time specific’ data.