Difference Between Male And Female Blue Jays


The blue jay is a passerine bird in the family Corvidae, native to eastern North America. It lives in most of the eastern and central United States; some eastern populations may be migratory. Resident populations are also in Newfoundland, Canada; breeding populations are found across southern Canada.

Though picking out a blue jay amongst other birds may be simple, differentiating between a male and female blue jay is a different task entirely. Male and female blue jays are not sexually dimorphic, meaning there are no differences in their plumage. Males tend to be larger than females, but the difference is minuscule. Let us talk about the more about the two.

Male and Female Blue Jays

Male and female Blue Jays are generally similar in size. Male Blue Jays have brighter and more vibrant blue feathers compared to females. Their plumage appears richer in shades of blue with white and black markings. Females, on the other hand, tend to have slightly duller and more muted blue feathers.

Both male and female have a crest on their heads, which can be raised or lowered depending on their mood or to communicate with other birds.

Blue Jays produce loud and varied calls, which they use for communication. Both males and females produce similar vocalizations, it is only the timing and context of their calls that may differ. During the breeding season, males might be more vocal as they establish territories and attract mates.

These bluebirds are monogamous birds and both sexes are usually active in building nests and raising their young. Females are responsible for incubating the eggs, but males may assist by bringing food to the female during this period.

During the breeding season, male Blue Jays can show more aggressive and territorial behavior as they defend their nesting territory. They may engage in confrontations with other males and display dominance through posturing and vocalizations.

These birds are omnivorous birds and are known to cache food for future consumption. Both males and females engage in foraging activities, which include collecting and hiding seeds, insects, and other food items.

Male vs Female Blue Jays: Key Differences

CharacteristicMale Blue JaysFemale Blue Jays
Plumage ColorBright cobalt blue with white markingsSlightly duller blue with less white
SizeSlightly larger in sizeSlightly smaller in size
Bill SizeSlightly longer and thicker billSlightly shorter and thinner bill
Crest SizeTypically have larger crestsSmaller crests
Facial MarkingsBlack necklace-like band across the throatOften lacks the black band
Eye ColorDarker, often deep blackish-brownSlightly lighter, brownish eyes
BehaviorMay be more aggressive and vocalOften less aggressive and vocal
Courtship DisplaysEngages in elaborate courtship ritualsMay be more passive during courtship
Nest BuildingMay help gather materials for the nestOften responsible for nest building
Incubation DutiesGenerally not involved in incubationPrimarily responsible for incubation
Feeding YoungMay assist in feeding the youngAlso involved in feeding, but roles may vary
Territorial BehaviorMay exhibit more territorial behaviorGenerally less territorial behavior
VocalizationsMay have a slightly different callCalls are generally similar