Cyanistes caeruleus, Eurasian Blue Tit
Passeriformes – Paridae
N.B.: Sexing Blue Tits outside the breeding season requires some experience. It is advisable not to use plumage characteristics alone. During the breeding season, sexing is rather easy thanks to the presence of brood patch in females and quite distinct cloacal protuberance in males, and it is this time that one can learn the plumage differences. Morphometrics is helpful.
CZEP16-016
Sex: M, age: 1CY (euring: 3), trapped: October, 2016 in Prague, Czech Republic
CZEP16-017
Sex: F, age: 1CY (euring: 3), trapped: October, 2016 in Prague, Czech Republic
CZEP17-019
Sex: M, age: 2CY (euring: 5), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-021
Sex: F, age: 2CY+ (euring: 6), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-022
Sex: M, age: 4CY (euring: 9), trapped: January, 2017 in Vysočina Region, Czech Republic
Age is known more precisely as this is a retrap. This bird was ringed as 2CY (euring 5) in April, 2015 by another ringer.
CZEP17-026
Sex: M, age: 2CY+ (euring: 6), trapped: January, 2017 in Prague, Czech Republic
CZEP17-027
Sex: M, age: 2CY+ (euring: 6), trapped: January, 2017 in Prague, Czech Republic
CZEP17-033
Sex: U, age: 2CY (euring: 5), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-035
Sex: M, age: 2CY+ (euring: 6), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-036
Sex: M, age: 2CY (euring: 5), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-037
Sex: M, age: 2CY (euring: 5), trapped: January, 2017 in Vysočina Region, Czech Republic
CZEP17-050
Sex: M, age: 2CY (euring: 5), trapped: February, 2017 in Prague, Czech Republic
CZEP17-053
Sex: F, age: 2CY (euring: 5), trapped: February, 2017 in Prague, Czech Republic
CZEP17-054
Sex: M, age: 2CY (euring: 5), trapped: February, 2017 in Prague, Czech Republic
CZEP17-055
Sex: M, age: 2CY+ (euring: 6), trapped: February, 2017 in Prague, Czech Republic
CZEP17-099
Sex: F, age: 2CY (euring: 5), trapped: February, 2017 in Vysočina Region, Czech Republic
CZEP17-101
Sex: F, age: 2CY+ (euring: 6), trapped: February, 2017 in Vysočina Region, Czech Republic
CZEP17-187
Sex: M, age: 2CY+ (euring: 6), trapped: March, 2017 in Vysočina Region, Czech Republic
CZEP17-375
Sex: M, age: 1CY (euring: 3), trapped: August, 2017 in Vysočina Region, Czech Republic
CZEP17-389
Sex: M, age: 1CY juv (euring: 3J), trapped: August, 2017 in Vysočina Region, Czech Republic
Still showing traces of juvenile plumage.
CZEP17-390
Sex: M, age: 1CY juv (euring: 3J), trapped: August, 2017 in Vysočina Region, Czech Republic
Still showing traces of juvenile plumage.
CZEP17-429
Sex: M, age: 1CY (euring: 3), trapped: October, 2017 in Vysočina Region, Czech Republic
CZEP18-003
Sex: M, age: 2CY (euring: 5), trapped: January, 2018 in Vysočina Region, Czech Republic
Unusually for a Blue Tit, this individual did not replace some of its great coverts during its postjuvenile moult.
CZEP18-014
Sex: F, age: 2CY (euring: 5), trapped: January, 2018 in Vysočina Region, Czech Republic
CZEP18-016
Sex: F, age: 2CY+ (euring: 6), trapped: January, 2018 in Vysočina Region, Czech Republic
CZEP18-017
Sex: M, age: 2CY+ (euring: 6), trapped: January, 2018 in Vysočina Region, Czech Republic
CZEP18-018
Sex: F, age: 2CY+ (euring: 6), trapped: January, 2018 in Vysočina Region, Czech Republic
CZEP18-019
Sex: M, age: 2CY (euring: 5), trapped: January, 2018 in Vysočina Region, Czech Republic
CZEP18-099
Sex: F, age: 2CY+ (euring: 6), trapped: March, 2018 in Vysočina Region, Czech Republic
CZEP18-100
Sex: M, age: 2CY+ (euring: 6), trapped: March, 2018 in Vysočina Region, Czech Republic
CZEP18-173
Sex: F, age: 2CY (euring: 5), trapped: April, 2018 in Vysočina Region, Czech Republic
CZEP18-191
Sex: F, age: 2CY (euring: 5), trapped: April, 2018 in Vysočina Region, Czech Republic
Unusually for a Blue Tit, this individual did not replace some of its great coverts during its postjuvenile moult.
CZEP18-324
Sex: F, age: 2CY (euring: 5), trapped: May, 2018 in Vysočina Region, Czech Republic
An individual with its plumage in an extraordinary bad shape.
CZEP19-006
Sex: M, age: 2CY (euring: 5), trapped: January, 2019 in Vysočina Region, Czech Republic
CZEP19-030
Sex: F, age: 2CY (euring: 5), trapped: February, 2019 in Vysočina Region, Czech Republic
Unusually for a Blue Tit, this individual did not replace some of its great coverts during its postjuvenile moult.
CZEP20-134
Sex: M, age: 5CY+ (euring: 12), trapped: May, 2020 in Vysočina Region, Czech Republic
Age is known more precisely as this is a retrap. This bird was ringed as 2CY+ (euring 6) in May, 2017.
CZEP20-447
Sex: F, age: 1CY (euring: 3), trapped: October, 2020 in Jeseníky Mts., Czech Republic
Unusually for a Blue Tit, this individual did not replace some of its great coverts during its postjuvenile moult.
CZEP21-155
Sex: F, age: 2CY (euring: 5), trapped: May, 2021 in Vysočina Region, Czech Republic
This individual quite unusually did not replace two of the greater coverts during postjuvenile moult.
CZEP23-242
Sex: F, age: 1CY+ (euring: 4), trapped: November, 2023 in Vysočina Region, Czech Republic
CZEP24-174
Sex: F, age: 1CY (euring: 3), trapped: October, 2024 in Jeseníky Mts., Czech Republic