Birds- Nesting Styles
BIRDS – NESTING STYLES
NIDICOLOUS and NIDIFUGOUS BIRDS
Birds do not live in nests all the time. In fact it does not live there except for incubating their young ones.
Being (Diurnal- active by day) they go in search of food in the day and roost in a convenient spot in the night mostly perching on a tree branch.
“BIRD’S HOUSE IS CALLED A NEST” IS A WRONG CONCEPT! Unfortunately we do not have much control on the text books that gets published. This is similar to the statement “Cauliflower is a FLOWER”, which is again is a wrong concept. If Cauliflower is a flower, should it not have the other parts of a flower, like petals, sepals, anthers etc.? Technically cauliflower is undeveloped flower buds. It does give separate yellow coloured flower when it matures, rising from the middle portion in a long stalk.
Birds build nest only for BREEDING young ones. Nest building is more through instinct and the material used by different birds differ and the styles of nest are also different. It is possible to identify a bird by observing its nest. Some like TAILOR BIRD (Orthotomus sutorius) stitch leaves. “Tailorbirds get their name from the way their nest is constructed. The edges of a large leaf are pierced and sewn together with plant fibre or spider’s web to make a cradle in which the actual grass nest is built.”
When and how do birds build nest?
Most animals, even the GREGARIOUS(living in loosely organised groups and flocks includes humans too) ones, do not intentionally recognise its opposite sex except during breeding season. Emotional attachment is unique and well developed in human beings to the extent of taking care of the Chid and old. (With the abnormal increase in old age homes and crime against the aged, perhaps, we seem to be e loosing this emotional attachment. Can we afford to blame evolution?) Birds are not an exception even those that live in flocks.
Each bird has a specific breeding season when the male and female bird pairs. The pairing lasts at least for one season in most cases as the parents take care of building nest and caring the siblings. In some cases such as ruby-throated humming birds, the emotional relationship lasts only till mating and after that the male goes away.
Birds do not form emotional relationships like humans do, and their main drive for forming a pair bond is to produce offspring rather than for any emotional fulfilment. For all birds, the odds of producing surviving offspring are increased with a strong, healthy mate, which is why birds have different courtship rituals to find the most suitable partner.
As a RULE ,
“Birds that build nests on trees and lay eggs, hatch to give NAKED CHICKS, and fed by parent till they grow feathers and are capable of flying.”
“Birds that build nests on ground and lay eggs , hatch to give fully grown chicks capable of walking and feeding themselves immediately after hatching”
BASED on THE NESTING SITE, BIRDS ARE CLASSIFIED AS
- NIDICOLOUS (ni·dic·o·lous(n-dk-ls)) BIRDS and
- NIDIFUGOUS BIRDS
- NIDICOLOUS birds remain in the nest for a time after hatching. The hatchlings are born without feathers.
- NIDIFUGOUS birds leave the nest shortly after hatching. They are born after feathers have grown on them.
Let us know about them in detail
In simple words, “the birds that are born on nests in trees are NAKED, BLIND, almost immobile and helpless. These baby birds (hatchlings) are without feathers. These are called Nidicolous birds”. Technically such birds are also called as ALTRICIAL meaning :