Cardinal chicks hatch blind, naked, and weighing 3.5 grams. They leave the nest just 7-13 days later, spend several weeks on the ground learning to fly, and stay dependent on their parents for up to two months.
Development Timeline
| Age | Stage | What’s happening |
|---|---|---|
| Day 0 | Hatchling | Blind, naked, pink skin, 3.5g |
| Day 1-4 | Nestling | Eyes opening, grey down growing, rapid weight gain |
| Day 5-7 | Nestling | Fluffy down, eyes open, pin feathers emerging |
| Day 7-13 | Fledging | Leaves nest, short clumsy flights, brown-grey plumage |
| Week 2-4 | Fledgling | On or near the ground, parents still feeding, building flight skills |
| Week 4-8 | Juvenile | Flying well, learning to forage independently |
| Month 2-3 | Independent | Fully independent, joins juvenile flocks |
| Month 3-6 | First molt | Males begin showing red feathers |
| Year 2 | Adult plumage | Males fully red, females tan-brown with red accents |
Weight Progression
| Week | Weight |
|---|---|
| Week 1 | 3-5g |
| Week 2 | 15-20g |
| Week 3 | 25-30g |
| Week 4 | 35-40g (approaching adult weight of 42-48g) |
What Do Baby Cardinals Look Like?
Hatchlings (day 0-3) are almost entirely naked with pinkish-red skin and a few wisps of grey down. They are tiny, helpless, and completely dependent on their parents for warmth and food.
Nestlings (day 3-13) develop fluffy grey-brown down, then pin feathers that gradually unfurl into juvenile plumage. By the time they leave the nest, they are covered in brown and tan feathers with a small crest already visible.
Fledglings (week 2-8) look like dull brown versions of adult females. Both male and female juveniles are brown-grey at this stage. Male juveniles gradually develop red feathers starting with their first molt at 3-6 months old. Full adult male plumage takes until the second year.
Parental Care
Both parents feed the chicks, but they divide duties. The male typically feeds the female while she incubates, and the female regurgitates food for the nestlings. Once chicks fledge, the male often takes over feeding duties for the first brood while the female starts a second clutch.
Parents feed fledglings for 2-8 weeks after they leave the nest. During this period, the young birds follow their parents, begging with open mouths and fluttering wings.
Diet by Age
| Stage | Diet |
|---|---|
| Nestling | Insects - caterpillars, beetles, spiders (high protein for growth) |
| Fledgling | Insects, gradually adding seeds and fruit |
| Juvenile | Mix of insects, seeds, and berries |
| Adult | Seeds, berries, insects (roughly 70% plant, 30% insect) |
Common Predators
Fledglings on the ground are extremely vulnerable. Cats, snakes, raccoons, and larger birds (crows, jays, hawks) are the main threats. If you find a cardinal fledgling on the ground, leave it alone - the parents are almost certainly nearby and still feeding it.
If you see a scruffy brown bird with a crest at your feeder being followed by a bright red cardinal who keeps putting food in its mouth, you are watching a male cardinal feeding his fledgling. It is one of the best sights in backyard birding.
