Three Traditional Temple Deities

1. The first, is the one presented to Sri Bashyakara (Ramanuja) by Goddess Saraswathi. It is the presiding deity of Sri Parakala Math, Mysore.
2. The second is the diety in a yoga posture presented to Vedanta Desika by Garuda in Thiruvahindrapuram, which is in the Sanctum Sanctorum of Sri Devanatha swamy, Thiruvahindrapuram.
3. The third Diety is on the hill at Thiruvahindrapuram and Swamy Desikar has composed a Hayagriva stotram on Him.

Tiruvahindrapuram / Tamil Discource

http://prtraveller.blogspot.com/2008/03/thiruvahindrapuram-devanathan_29.html

Ashtottara Shatanamavali / Book / Story

http://www.srihayagrivan.org/ebooks/033_hasn.pdfIn the Sri Vaishnavite tradition, Swami Sri Vedanta Desika (born in 1317 A.D. in Thoopul near Kanchipuram) is considered to be the incarnation of the ghanta (bell) of the Lord of the Seven Hills, The Tirupati. He was a child prodigy who had risen to the status of "Acharya" at the age of 27. On initiation into the realm of the Garuda mantra, among his all Stotra, Swami Desikan went to Thiruvahindrapuram and began chanting. Pleased with his devotion, Garuda initiated him into the Hayagriva Mantra

Purvabhadra -Nakshatra of the day

http://manasasancharare.wordpress.com/2010/02/16/nakshatra-of-the-day-2/

Horse in Sky Formations

Hayagriva : Skanda Purana and Devi Bhagavatham

http://ancientindians.wordpress.com/2010/06/21/hayagriva-vishnu-gets-back-his-head-skanda-purana/