nestling (n.)
- apprentice
- avifauna
- baby
- beginner
- bird
- birdie
- bundling
- calf
- caressing
- catechumen
- catling
- chick
- colt
- cub
- cuddling
- cygnet
- dalliance
- deb
- dogie
- dove
- duckling
- eagle
- eaglet
- entrant
- evergreen
- fawn
- fledgling
- foal
- fondling
- fowl
- freshman
- fryer
- fulmar
- gosling
- green
- greenhorn
- hugging
- infant
- kid
- kissing
- kit
- kitten
- lamb
- lambkin
- learner
- litter
- lovemaking
- maiden
- migrant
- necking
- neophyte
- nest
- new
- newcomer
- novice
- novitiate
- original
- owl
- peacock
- peafowl
- peahen
- petting
- pigeon
- piglet
- polliwog
- probationer
- pullet
- pup
- puppy
- ratite
- raw
- recruit
- rookie
- shoat
- snuggling
- songbird
- squab
- swan
- tadpole
- tenderfoot
- trainee
- tyro
- virgin
- virginal
- warbler
- waterfowl
- whelp
- wildfowl
- young