Here are the possible solutions for nesting site clue
Answer
Clue
Relevancy
eave
Clue
Nesting site, perhaps
Nesting site
Definition
to give cover under the eaves of a building
islet
Clue
Tern's nesting site, perhaps
Sea gull nesting site, maybe
Definition
a small island
mistletoe
Clue
Spotted-owl nesting site
Definition
a Eurasian evergreen shrub, with leathery leaves, yellowish flowers, and waxy white berries, grows as a partial parasite on various trees, also MISLETOE
cacti
Clue
Nesting places for elf owls
Definition
CACTUS, (Latin) a succulent plant of the family Cactaceae, with thick fleshy stems, usually spiny and without leaves