alu pe , ▁the ▁winter - bre eding ▁Ain ley ' s ▁and ▁the ▁summer - bre eding ▁Town send ' s , ▁in ▁accord ance ▁with ▁G ause ' s ▁law . ▁ ▁The ▁single ▁egg , ▁white ▁with ▁a ▁faint ▁ring ▁of ▁re dd ish - b rown ▁and ▁lav ender ▁spe ck les ▁around ▁the ▁bl unt ▁end , ▁was ▁laid ▁in ▁bur rows ▁maybe ▁ 1 5   in ▁( 3 5 – 4 0   cm ) ▁long , ▁below ▁the ▁Gu ad alu pe ▁p ine ▁( P inus ▁radi ata ▁var . ▁bin ata )- is land ▁o ak ▁( Qu erc us ▁t oment ella ) ▁cloud ▁forest ▁on ▁top ▁of ▁Mount ▁August a . ▁By ▁mid - J une , ▁almost ▁all ▁young ▁had ▁already ▁left ▁the ▁bur rows . ▁Though ▁little ▁data ▁is ▁available ▁on ▁Ocean od rom a ▁bre eding , ▁inc ub ation ▁was ▁pres umably ▁ 4 2 ▁days ▁or ▁so ▁in ▁this ▁species , ▁just ▁as ▁in ▁similar - s ized ▁relatives . ▁Time ▁to ▁fled ging ▁must ▁have ▁taken ▁between ▁ 6 0 ▁and ▁ 7 5 ( − 8 5 ?) ▁days , ▁most ▁likely ▁around ▁ 6 5 ▁days . ▁This ▁would ▁mean ▁that ▁egg - lay ing ▁took ▁place ▁from ▁early ▁February ▁to ▁March , ▁and ▁that ▁in ▁April – May , ▁unf led ged ▁young ▁were ▁present ▁in ▁most ▁active ▁bur rows . ▁Just ▁as ▁in ▁their ▁relatives , ▁the ▁egg ▁was ▁inc ub