Extract images from background

I want to extract 55 illustrations of whales and dolphins from 4 large JPEG image files. You can have a look at the original 4 JPEG files here: [login to view URL] I would like each individual specie (listed below) to be placed in an individual file, GIF format with transparent background and 600 pixels in width (height will vary). I expect any aliasing effect not to be noticeable in the resulting GIF files. This might not be possible for all the species (some illustrations are much smaller than others and also some are slightly overlapped in the original files). Here is the list of species from each file: Species from file mbm21: Bowhead whale Antarctic minke whale Omura's whale Pygmy right whale Grey whale Southern right whale North Pacific right whale Species from file mbm18: Chilean dolphin Pygmy orca Commerson's dolphin Heaviside's dolphin Hector's dolphin Long Beaked common dolphin (alternatively from mbm16) Atlantic white-sided dolphin (alternatively from mbm16) White-beaked dolphin (alternatively from mbm16) Peale's dolphin Hourglass dolphin Pacific white-sided dolphin (alternatively from mbm16) Dusky dolphin Northern right whale dolphin (alternatively from mbm16) Southern right whale dolphin Finless porpoise Irrawaddy dolphin Australian snubfin dolphin Spectacled porpoise Harbour porpoise (alternatively from mbm16) Vaquita Burmeister's porpoise Dall's porpoise (alternatively from mbm16) Tucuxi Indo-Pacific humpback dolphin Atlantic humpback dolphin Pantropical spotted dolphin Clymene dolphin Spinner dolphin Species from file mbm16: Beluga Narwhal Long-beaked bottlenose dolphin Species from file mbm04: Arnoux's beaked whale Baird's beaked whale Southern bottlenose whale Longman's beaked whale Andrew's beaked whale Hubb's beaked whale Gervais' beaked whale Ginkgo-toothed beaked whale Gray's beaked whale Hector's beaked whale Strap-toothed whale True's beaked whale Perrin's beaked whale Pygmy beaked whale Stejneger's beaked whale Shepherd's beaked whale I would like your bid to include the following: - How many species do you think you'll be able to extract with the expected quality (if there are any species that you don't think you can extract, list them) - How long would it take you - How much would it cost I'm looking forward to your bids.