Newborn babies of _our_ species don''t crawl.
But apparently the word baby can mean other species as well (I looked it up to be sure).
Take the Kangaroo and other marsupials for example. The baby Kangaroo, looking like a foetus and being absolutely tiny in proportion to a Joey, (which is a young Kangaroo in case you didn''t know) crawls up the mother''s fur on birth and finds it''s way into the pouch for the last several months of development into a young Kangaroo, attaching itself to the mother''s teat inside the pouch. I can''t say it''s performing lactotaxis
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but it performs a set of hard-coded behaviours involving crawling towards milk the second it''s born. These Kangaroo babies are approximately 2.5 centimetres (1 inch) in length.
Some argue that the reason human''s are so unable to care for themselves at birth is because the high level of plasticity and potential for adaptation that we have necessitates a lack of hard coding at birth (we still have hard coding but a lot less than (perhaps almost) all other species).
The detachment from hard wiring in the brain might allow our bodies and brains to evolve more swiftly (you evolve the body but can''t evolve it away from the hard coding, so you can''t evolve it very far before letting the hardcoding catch up). This brings into question whether evolvability itself is an evolutionary advantage giving an individual increased fitness on an evolutionary scale. It probably is.
Mike