think the mother robin chose the spot on the right for an
spring nest and the spot on the left for a second and third nest.
want safe places to build their nests. A robin usually builds
its first nest of the season before leaves come
out. Mom knows it's best to build that nest in an evergreen
tree (or under an overhang) so the babies have shelter. Once
other trees get their leaves (like the tree on the left),
they can provide shelter.
do robins need shelter from? The eggs and
nestlings need shelter from rain, late snow, wind, and sun.
(Baby birds are in big danger of sunburn before their feathers
grow in.) Predators might take the eggs or the babies.
offer shelter and shade, and help hide the nest from predators.
robins also know that babies need some sunlight
for vitamin D to keep them healthy. So they build the nests
where the babies will get just enough sun— not too
much and not too little!