(Ref.: Wikipedia)
 
"... Bayer added to his titles for Ophiuchus Grus aut Ciconia Serpenti cum inscriptione, Elhague, insistens, which he said was from the Moors, but Ideler asserted was from a drawing of a Crane, or Stork, on a Turkish planisphere instead of the customary figure; and the Almagest of 1551 alludes to Ciconia as if it were a well-known title. All this, perhaps, may be traced to ancient India, whose mythology was largely astronomical, and the Adjutant-bird, Ciconia argala, prominent in worship as typifying the moon-god Soma, so that its devotees would only be following custom in locating it among the stars ..." (Allen)
 

"The modern English word can be traced back to Proto-Germanic *sturkaz. Nearly every Germanic language has a descendant of this proto-language word to indicate the (White) stork ... the Germanic root is probably related to the modern English 'stark', in reference to the stiff or rigid posture of a European species, the White Stork. A non-Germanic word linked to it may be Greek torgos ('vulture').

In some West Germanic languages cognate words of a different etymology exist. They originate from *uda-faro, uda being related to water meaning something like swamp or moist area and faro being related to fare, so *uda-faro being he who walks in the swamp. In later times this name was reanalyzed as *ōdaboro, ōda 'fortune, wealth' + boro 'bearer' meaning he who brings wealth adding to the myth of storks as maintainers of welfare and bringing the children ...

In Victorian times the details of human reproduction were difficult to approach, especially in reply to a younger child's query of 'Where did I come from?'; 'The stork brought you to us' was the tactic used to avoid discussion of sex. This habit was derived from the once popular superstition that storks were the harbingers of happiness and prosperity, and possibly from the habit of some storks of nesting atop chimneys, down which the new baby could be imagined as entering the house ...

(Wikipedia)
 
 
I suggest Roto Iri Are is the 'Season of The Stork', i.e. the month 'bringing' (announcing the arrival of) Tama (the baby sun). The Victorians preferred the myth before the truth. A sun child must come from above (where father sun moves), therefore a bird is necessary for the transport. The Indian bird named Adjutant belongs to another genus (Leptoptilos) than the storks, and they fly with their necks retracted (while storks have their outstretched):
 
 
Carrying babies around their necks of course explains why they cannot have their necks outstretched.